PROFILE: Lee Jae-myung, Seoul's pragmatist — reforming the peninsula without losing Trump

PROFILE: Lee Jae-myung, Seoul's pragmatist — reforming the peninsula without losing Trump

Introduction: A man between two worlds

From the courtroom to the Blue House: an extraordinary rise

Lee Jae-myung entered the Blue House in June 2025 with a still-open judicial record, a reputation as a left-wing populist that frightened the business community, and a vision for the Korean peninsula that many considered naively idealistic. A year later, at the G7 summit in Évian-les-Bains, he sat next to Donald Trump for 90 minutes, offered him counsel on North Korea, received his pen as a keepsake, and returned to Seoul with a promise of a round of golf and a consensus on the step-by-step approach to denuclearization. The pragmatist had delivered.

This profile is of a man who defies simple classification. Lee Jae-myung is not the Zelensky of the Korean peninsula — he operates in a fundamentally different geopolitical environment, where the North Korean nuclear threat is real but direct confrontation is less immediate. He is not the soft leader his right-wing critics feared either: his trade concessions to Trump, his support for nuclear-powered submarines, and his reinforcement of the American-Korean alliance surprised even his own supporters.

A profile that cannot be reduced to a single line

Lee Jae-myung is the first South Korean president in years to have been invited two consecutive years to the G7 as a partner. At Évian in June 2026, he met not only Trump, but also German Chancellor Friedrich Merz, Canadian Prime Minister Mark Carney, and Italian Prime Minister Giorgia Meloni. In Brussels, during the European tour preceding the G7, he signed a digital trade agreement with the European Union and elevated bilateral relations with Italy to the rank of special strategic partnership. This is not the profile of an isolationist pivoting toward Pyongyang — it is that of a leader playing all his cards simultaneously.

To understand Lee, one must understand the context: South Korea is emerging from a deep internal political crisis — the brief martial law episode of his predecessor Yoon Suk-yeol — and is seeking to restore its international credibility. Lee carries this mandate of normalization as much as his own political vision.

Lee's North Korea doctrine: freeze first, denuclearization second

A realistic approach that even Trump found convincing

Lee Jae-myung's most significant contribution to international diplomacy may be his reformulation of the North Korean question for Donald Trump. At the G7 dinner on June 16, 2026, Lee explained to Trump that sanctions alone no longer work — that military cooperation between Pyongyang and Moscow has rendered sanctions nearly ineffective, that North Korea already possesses between 50 and 60 nuclear weapons and produces enough fissile material to build 10 to 20 more per year, and that North Korean ICBMs are approaching the final phase of development, including atmospheric re-entry capability.

His proposal: abandon the demand for immediate denuclearization as a precondition for any dialogue. Adopt instead a three-stage approach — short term: freeze fissile material production and overseas weapons transfers; medium term: progressive arsenal reduction; long term: complete denuclearization as the final objective. Trump, who had expressed frustration at the lack of progress in his dialogue attempts with Kim Jong-un, responded that it was "one possible way to proceed" and agreed to think it over. That is not nothing.

Kim Jong-un between refusal and calculation

Lee's strategy runs into a fundamental obstacle: Kim Jong-un has stated repeatedly that he will never renounce his nuclear arsenal. Since Lee's inauguration in June 2025, Pyongyang has rejected all dialogue offers from Seoul. The meeting between Xi Jinping and Kim in June 2026 — with no public mention of denuclearization — suggests that North Korea's diplomatic protection scheme remains intact. And the strengthened military cooperation between Pyongyang and Moscow in the context of the war in Ukraine has given North Korea economic resources and a strategic shield that further reduce the pressure of sanctions.

The regional context has grown more complicated: Iran, weakened by the war with the United States and then by the Lucerne negotiations, had until now been one of Pyongyang's partners in resisting Western sanctions. American-Iranian normalization could, paradoxically, deepen North Korea's isolation — but it could also push Pyongyang to deepen its ties with Moscow, its last major strategic partner.

The American alliance: trade concessions to preserve security

Painful but pragmatic compromises

Lee Jae-myung's relationship with the Trump administration required significant trade and strategic concessions that his own left-wing supporters received poorly. According to Dan Sneider, a long-time Korea observer, Lee made concessions on trade and investment in negotiations with the Trump administration to preserve the security alliance, even though he secured better terms than Japan on several fronts. Politics sometimes becomes the art of the lesser evil.

On the thorny question of the transfer of wartime operational command (OPCON) — currently held by the United States — Lee secured an agreement to accelerate the timeline for South Korea's recovery of that command, a sovereignty objective he presents as "too obvious to even discuss" with Trump. He also secured Trump's preliminary support for the development of Korean nuclear-powered submarines — a considerable advance that could imply a revision of restrictions on South Korean nuclear fuel enrichment and reprocessing.

The Seoul-Washington-Tokyo triangulation

One of Lee Jae-myung's most surprising achievements is his strengthening of relations with Japan, despite the deep historical tensions between the two nations. Lee and Japanese Prime Minister Takaichi Sanae elevated bilateral relations, exchanged visits to each other's hometowns, and strengthened defense and energy cooperation. This is remarkable for a leader whose political camp traditionally had a strained relationship with Tokyo.

This Seoul-Washington-Tokyo triangulation is strategically essential in the face of a nuclearized North Korea and an increasingly assertive China. Lee has grasped something that some of his predecessors tried to minimize: South Korea cannot afford to choose between its democratic allies in a context where its adversaries — North Korea, China, Russia — are increasingly coordinated.

The North Korean nuclear specter: a growing threat

A de facto nuclear power — irreversibly so

The assessment Lee Jae-myung laid out for Trump at the G7 dinner is unsparing: North Korea is a de facto nuclear power. With 50 to 60 nuclear weapons and the capacity to produce 10 to 20 more per year, Pyongyang is no longer at the stage where external pressure could prevent its accession to nuclear status. That stage passed years ago. The realistic objective is no longer prevention but limitation.

The North Korea-Russia military cooperation in the context of the war in Ukraine — with North Korean soldiers at the front and munitions transfers — has provided Pyongyang with revenues and Moscow's diplomatic backing that have significantly reduced the effectiveness of international sanctions. Lee said it to Trump plainly: sanctions no longer work. A different way of thinking is required.

ICBM technology: the approaching red line

The development of atmospheric re-entry technology for North Korean ICBMs is the most urgent threat identified by Lee. Once this technology is mastered, North Korea will have a reliable strike capability against the American continental mainland. This threshold crossing would transform the nature of American nuclear deterrence, complicate extended security guarantees to South Korea and Japan, and strengthen the arguments for autonomous nuclearization in Seoul — an option Lee explicitly rejects, but whose pressure on Korean public opinion he acknowledges.

It is in this context that Lee's request that Trump "lead" the resolution of the North Korean question takes on its full meaning: only an American president has the diplomatic capital and strategic weight to open a dialogue with Kim Jong-un. Trump, who met Kim three times during his first term and harbors a fascination for the North Korean leader, may be the only Western actor capable of breaching the wall of North Korean isolation. Lee knows this and is playing that card.

Europe, the Vatican, and the geography of peace

A European tour that broadens diplomatic horizons

Lee Jae-myung's European tour in June 2026 — Brussels, Rome, the Vatican, Évian — was the first by a South Korean president in eight years to visit Brussels to meet EU leaders. This tour resulted in a digital trade agreement with the European Union, a special strategic partnership with Italy, and a joint EU-South Korea declaration condemning North Korea's military support for Russia in the war in Ukraine.

The visit to Pope Leo XIV at the Vatican has a symbolic but also practical dimension: Lee invited the pope to visit South Korea for World Youth Day 2027, and speculation is circulating that the pope might attempt a visit to North Korea — an unprecedented humanitarian and diplomatic channel. The idea is not far-fetched: the Vatican maintains diplomatic relations with states under very different regimes, and a papal visit to Pyongyang could open communication channels that official diplomacy cannot reach.

Seoul's positioning in the great-power rivalry

South Korea under Lee Jae-myung is not choosing between the West and a regional neutrality policy: it is choosing the West while seeking dialogue channels with the North. This position is consistent with a vision in which the Korean peninsula is not destined to be the stage for a Sino-American proxy war, but a space of regional stability anchored in democratic alliances. It is an ambitious vision in a context where China and Russia are doing everything to destabilize these anchors.

A critical point: Lee's strategy rests on the premise that Trump can be convinced to invest diplomatically in the Korean question. But Trump is unpredictable, his attention is volatile, and American policy can pivot quickly. The dependence of Lee's strategy on the goodwill of a single man in Washington is a strategic vulnerability that Seoul cannot fully mitigate.

North Korea and soldiers sent to Russia: a line crossed

The military reality of the North Korean deployment in Ukraine

The deployment of North Korean soldiers in support of the Russian army in Ukraine represents a qualitative rupture in the war. Thousands of troops — estimates range between 10,000 and 12,000 according to American and South Korean intelligence services — were sent to fight alongside Russian forces, primarily in the Kursk region. These soldiers provide mass to a Russian army suffering considerable losses, but they also bring something more valuable: real combat experience that Pyongyang had not had in decades.

For Lee Jae-myung, this deployment is not just an abstract threat to regional security — it is a direct one. North Korean soldiers acquiring real combat experience, observing the use of drones, precision missiles, and modern electronic warfare, are strengthening an army whose weapons point at South Korea. The on-the-job training in Ukraine is a military investment that Pyongyang could not have funded otherwise.

Seoul's response: between firmness and caution

Seoul responded to the North Korean deployment by strengthening its own defense posture and through active diplomacy aimed at internationalizing the issue. The joint EU-South Korea declaration from the Brussels summit of June 2026 condemning Pyongyang's military support for Moscow fits within this strategy: documenting and denouncing North Korea's behavior before international institutions to diplomatically isolate the regime.

Seoul's caution stems from the awareness that any escalation on the Korean peninsula would have catastrophic consequences. With a border separated by just a few dozen kilometers from the capital Seoul, and North Korean artillery aimed at the city, South Korea cannot afford a war of retaliation. Lee's strategy is therefore to build maximum international pressure on Pyongyang and its patrons — Moscow and Beijing — while maintaining a crisis dialogue capability to prevent accidental escalations.

Lee Jae-myung and South Korean national reconciliation

A president elected in a context of constitutional crisis

Lee Jae-myung came to power in the extraordinary context of the December 2024 constitutional crisis, when former President Yoon Suk-yeol attempted a power grab by declaring martial law before being overturned by the National Assembly. Elected in a snap election in April 2025, Lee inherited a deeply polarized society: between supporters and opponents of Yoon, between generations, between regions. His ability to govern effectively depends on his success at bridging these divides.

The paradox of Lee is that he is a progressive left-wing leader compelled by circumstances to adopt national security positions traditionally associated with South Korean conservatism. Facing a worsened North Korean threat, an indispensable American military alliance, and the demands of his European partners, he cannot afford the pacifism that has sometimes characterized his political formation. This is a pragmatic repositioning that his critics on both sides call incoherence and that his supporters call maturity.

Progressive foreign policy: human rights and multilateralism

Lee also embodies a repositioning of South Korean foreign policy toward a more explicit commitment to human rights and multilateralism. His condemnation of human rights in North Korea, his denunciation of Pyongyang's military support for Moscow, his engagement in international forums beyond pure security diplomacy — all of this is building an international image of South Korea as a middle power with global responsibility.

This posture produces concrete benefits. The digital trade agreement with the European Union, the special strategic partnership with Italy, the discussions on strengthening the existing EU-South Korea free trade agreement — all are tangible payoffs of an active diplomacy that positions South Korea as a reliable partner in an unstable world. Lee understands that in the competition between democratic and autocratic systems, democracies have an interest in standing together.

Northeast Asia in 2026: an arc of tensions that connects everything

Ukraine, North Korea, China: the systemic connections

The presence of North Korean soldiers in Ukraine, Chinese technological support for the Russian war economy, the strengthening of Pyongyang's military capabilities in exchange for munitions and expertise — all of this draws an arc of tensions structurally linking Northeast Asia to Europe. This connection invalidates the idea that the war in Ukraine is a regional European conflict without Indo-Pacific implications, or that tensions in the South China Sea are unrelated to what is happening on the Ukrainian front.

For Lee Jae-myung, this systemic connection is both a problem and an opportunity. A problem because it ties South Korea's security to distant dynamics it cannot control. An opportunity because it justifies South Korean diplomatic engagement well beyond the Korean peninsula, and because it creates common interests with European partners who had no historical reason to pay attention to the Korean situation.

South Korea as a bridge between Europe and the Indo-Pacific

South Korea is building a diplomatic bridge role between Europe and the Indo-Pacific that few countries can play. It is an advanced democracy, a leading technology economy, a United States security partner, and a regional actor with intimate understanding of North Korean and Chinese dynamics. This unique position gives it a voice and credibility that European countries are increasingly recognizing.

The partnerships forged during the June 2026 tour — with the EU, with Italy, with the Vatican — are not just bilateral agreements. They are the building blocks of a diplomatic architecture that Lee is constructing to position South Korea as an indispensable actor in the management of global crises. It is a realistic ambition for a country that demonstrated its ability to transform a devastating war (1950–1953) into one of the world's most dynamic economies.

Conclusion: An unfinished portrait of a leader still in construction

The balance sheet of a first year in power

After one year at the Blue House, Lee Jae-myung's record is complex and incomplete — as any honest political record is. On the international diplomatic front, his achievements are real and significant: strengthening the American alliance, improved relations with Japan, integration into the G7 club as a credible partner, progress on the nuclear submarine dossier. On the North Korean question, his analytical framework is the most realistic presented by a South Korean leader in a long time — but it runs up against a Kim Jong-un who has no immediate interest in negotiating.

Domestically, tensions persist: left-wing supporters disappointed by his concessions to Trump, a country that remains deeply divided by the fractures of the Yoon era. Lee's pragmatism is both his strength and his risk: he can govern from the center, but risks losing his base while never being fully accepted by the right. That is the curse of all centrists in polarized democracies.

What the West can expect from Lee

Lee Jae-myung is a reliable partner for the West — more reliable than his pre-election critics feared, less ideological than his supporters hoped. He understands that South Korea's security is inseparable from the liberal international order that Western democracies are working to maintain against China, Russia, and North Korea. His pragmatic approach to denuclearization may be the only realistic path toward reducing tensions on the peninsula. But whether it succeeds will depend on actors — Trump, Kim, Xi — over whom Lee has only limited influence. That is the tragic condition of any middle-power leader in a world of great powers.

By Maxime Marquette, columnist

Columnist's transparency note

My sources and their limits

This profile draws on reports from Reuters, Yonhap, The Diplomat, Carnegie Endowment, Chosun Ilbo, and accounts of Lee's European tour in June 2026. I do not have access to direct sources from the South Korean presidency and my knowledge of Korean domestic politics is that of an outside observer. Quotes attributed to Lee are drawn from his public press conferences as reported by news agencies.

What I do not know

I do not know the details of the South Korean-American trade negotiations, nor the real state of North Korean capabilities beyond what is publicly known. This profile is a snapshot of June 2026 — the diplomatic situation on the Korean peninsula is evolving rapidly.

Sources

Primary sources

The Straits Times — South Korea's Lee says Trump open to considering phased approach to North Korea nuclear issue — June 19, 2026

Korea Times — Lee asks Trump to spearhead resolution of NK issues at G7 meeting — June 16, 2026

The Diplomat — Lee Jae-myung Caps First European Tour with G7 Appearance — June 17, 2026

Secondary sources

Carnegie Endowment — President Lee Jae Myung: A Year in Power — June 24, 2026

Chosun Ilbo — Lee Advises Trump on Realistic North Korea Strategy Shift — June 19, 2026

Yonhap — Trump vows to play role in advancing Korean Peninsula issues — June 17, 2026

Al Jazeera — Trump hints at new approach to North Korea's nuclear programme — June 19, 2026

NK News — Lee calls for talks with North Korea on nuclear moratorium as Xi meets Kim — June 8, 2026