Geopolitics › East Asia › South Korea (Republic of Korea)
Lee Jae-myung
President since June 4, 2025· Leader
FactTreaties, membership, measured data, events.
South Korea's president since June 4, 2025, a liberal Democratic Party leader elected after his predecessor's failed martial-law decree.
See it on the Geopolitics map →The picture
Lee Jae-myung (이재명) rose from teenage factory worker to human-rights lawyer, Seongnam mayor and Gyeonggi governor. He narrowly lost in 2022, survived a stabbing in 2024, and won the June 3, 2025 snap election with 49.4% after President Yoon Suk Yeol was removed over his December 2024 martial-law decree. Lee calls his foreign policy 'pragmatic': the US alliance first, steadier ties with China and Japan, outreach to North Korea. In June 2026 local elections his party won 12 of 16 top races but lost Seoul.
Why it matters
He steers a top chip and shipbuilding economy through US tariff deals, the US–China rivalry and a nuclear-armed North, after a constitutional crisis that tested Korean democracy.
Record
National Election Commission results, the Constitutional Court's ruling removing Yoon, presidential office statements and the Korea–US joint fact sheet. As of 2026.
What to watch
Disputed: criminal trials against him on corruption and election-law charges are paused while he is in office; supporters call the cases political, critics call the pause a shield.
Connections (3)
▸Lee Jae-myung leads South Korea (Republic of Korea)Fact
The relationship
Lee took office the day after the June 3, 2025 snap election, with no transition period, because Yoon Suk Yeol had been removed. His Democratic Party also controls the National Assembly, so he can pass laws, such as the US investment act, without relying on the opposition.
Since when and why
Seoul; elected June 3, 2025 with 49.4% to Kim Moon-soo's 41.2%; sworn in June 4.
How we know
National Election Commission results and the Constitutional Court's April 4, 2025 ruling removing Yoon.
What to watch
Whether he can deliver growth and stock-market reform, and what happens to his paused criminal trials after his single five-year term.
▸South Korea's $350B US investment and tariff deal was concluded by Lee Jae-myungFact
The relationship
Lee personally closed the deal. He resisted paying $350 billion up front, warning it could trigger a 1997-style currency crisis, and won a $20 billion yearly cash cap plus shipbuilding cooperation branded 'Make American Shipbuilding Great Again'. He gave Trump a replica Silla gold crown at their Gyeongju summit.
Since when and why
White House summit, August 25, 2025, and Gyeongju summit on the APEC sidelines, October 29, 2025, with policy chief Kim Yong-beom and industry minister Kim Jung-kwan.
How we know
Presidential office briefings, Lee's interviews warning of a currency crisis, and the joint fact sheet released in November 2025.
What to watch
Debated: whether Lee struck a good bargain; critics say Korea pays too much for market access, supporters say it averted 25% tariffs and won a submarine deal.
▸Lee Jae-myung seeks to ease Korean peninsula standoff (armistice since 1953)Widely agreed
The relationship
Lee reversed his predecessor's hard line: he halted border propaganda loudspeakers in June 2025, curbed activist leaflet launches, and in September 2025 unveiled an 'END' plan (exchange, normalization, denuclearization) aimed at peaceful coexistence. He keeps the US alliance and joint drills. North Korea has rejected every overture.
Since when and why
Seoul, from June 2025; the plan announced at the UN General Assembly, September 2025; rebuffed by Kim Yo-jong, Kim Jong-un's sister.
How solid?
South Korean military confirmation that the loudspeakers came down, Lee's UN speech, and North Korean state media statements by Kim Yo-jong.
What to watch
Whether outreach can work while Pyongyang treats Seoul as a hostile foreign state; conservatives argue it weakens deterrence.