While the treaty was signed on June 30, 2007, ratification was slowed when President George W. Bush's
fast-track trade authority expired and a Democratic Party-controlled Congress expressed objections to the treaty related to concerns over bilateral trade in automobiles and U.S. beef exports. Nearly three years later, on June 26, 2010, President
Barack Obama and President
Lee Myung-bak expressed renewed commitment to the treaty, stating that they would direct their governments to resolve remaining obstacles to the agreement by November 2010. After discussions at the November
2010 G-20 Seoul summit and further negotiations in December 2010 in Maryland, Presidents Obama and Lee announced on December 4, 2010, that a deal had been reached; they subsequently signed an updated version of the agreement. On March 15, 2012, the agreement entered into effect. On September 16, 2008, U.S. Commerce Secretary
Carlos Gutierrez asked the
U.S Congress to ratify the Korea-U.S. free trade treaty as soon as possible, arguing that "trade creates more jobs and boosts economic growth". He called on the U.S. Congress to swiftly approve pending trade deals with
Colombia and
Panama as well. The
Grand National Party (GNP) was at the same time considering its position the National Assembly's ratification of the agreement. At a meeting of its top council held October 2, 2008, at party headquarters in
Yeouido, GNP leadership expressed divergent opinions. GNP chairman Park Hee-tae and supreme council member
Chung Mong-joon sided with the argument for circumspection. Park said it was first necessary to establish a plan for farmers and fishermen negatively affected by the agreement. He suggested looking at the government's countermeasures, then discussing passage of the FTA. But leaders within the National Assembly of South Korea argued for a quick resolution. Floor leader Hong Joon-pyo is reported to have said that the United States could propose renegotiations in the area of automobiles, which they felt was disadvantageous to the U.S. auto industry. He stated this could be done following the
U.S. election, but that it was necessary to ratify the FTA before then. On October 1, 2008, a South Korean trade official said that ratification was unlikely within the year given the U.S. political climate. On October 2, 2008, South Korea completed all procedures for parliamentary ratification and the trade bill was submitted to the
National Assembly. The Korean ambassador to the United States,
Lee Tae-shik, held more than 300 meetings with U.S. Congressmen to persuade them to ratify the FTA, which was facing objection from Democrats, who held a majority in both the
House of Representatives and the
Senate.
U.S. presidential election During the 2008 U.S. presidential election, both Senator
John McCain of the
Republican Party and Senator
Barack Obama of the
Democratic Party expressed commitment to a U.S.–Korea alliance, but the Democratic Party expressed anxiety about
globalization and renewed doubts about trade liberalization, which it argued could jeopardize the Korea-U.S. Free Trade Agreement. Its presidential candidate Barack Obama opposed the KORUS FTA as "badly flawed" during his campaign because in his view it would not do enough to increase U.S. auto sales. His criticism echoed the auto
labor unions. Obama said he would vote against the FTA if it came to the floor of the U.S. Senate and that he would send it back to Korea if elected president. Obama had expressed similar negative feelings about the
North American Free Trade Agreement between the U.S., Canada and Mexico, threatening during February 2008 campaign stops in industrial states to "opt out" of the three-nation agreement. His senior economic advisor
Austan Goolsbee assured Canadian officials in a private meeting on February 9 that Obama's rhetoric was "more reflective of political maneuvering than policy". The Republican Party pointed to a $20 billion increase in annual bilateral trade as evidence that both countries would benefit economically from lowering trade barriers, citing the Korea-U.S. trade deal as an example of the rewards of free trade in an era of growing
economic globalization. During the last half of 2008, U.S. officials expressed confidence that the trade deal would be approved after the November 4 election.
2011 developments After the opposition party backtracked on their agreement to negotiate the FTA, taking a more hardline stance, the ruling
Grand National Party reportedly considered expediting ratification of the FTA alone in the
National Assembly. Seoul wanted products made by South Korean companies in the
Kaesong Industrial Region in North Korea included in the deal; Washington did not. The disagreement is unresolved but was not allowed to scupper the deal, which allows for further talks on the subject. Lee Jeong-ryeol (), the chief prosecuting attorney at the Changwon District Court in
South Gyeongsang Province criticized the FTA on his
Facebook account, prompting concern from the judicial scene. There is a judicial movement to establish a special task group to speculate of a possible renegotiation of the agreement.
Renegotiation, 2016–2018 Donald Trump and the
President of South Korea Moon Jae-in deliver remarks after signing the United States-Korea Free Trade Agreement on September 24, 2018 During the
United States presidential campaign of 2016, Republican candidate Donald Trump described the United States–Korea Free Trade Agreement as a "job-killing trade deal". On April 27, 2017, President Trump announced his intention to renegotiate or terminate the treaty, describing it as a "one-way street" and "a Hillary Clinton disaster, a deal that should've never been made", characterizing the resulting situation as "We're getting destroyed in Korea" and that "It's a horrible deal, and we are going to renegotiate that deal or terminate it." According to Trump, "We've told them that we'll either terminate or negotiate; we may terminate", while South Korea's Ministry of Trade said it had yet to receive a request to open renegotiations. By October 4, 2017, the Trump administration had backed away from considering a full withdrawal from KORUS FTA and instead agreed with South Korea to renegotiate the deal. On March 16, 2018, the third round of Korea-U.S. FTA talks began. The talks concluded later on March 27, when an agreement in principle was reached between the Trump administration and the South Korean government. The terms included an increase of annual U.S. auto exports from 25,000 vehicles to 50,000 that are only required to meet U.S. safety regulations instead of South Korean regulations. A cap will also be placed on steel exports from South Korea to the United States, though South Korea will remain exempt from the 25% steel tariff the Trump administration placed on most other nations.
2019 In September 2019, the United States filed an environmental complaint under the agreement, alleging some fishing by South Korean vessels violated fishery management rules.
2025 Upon taking office in January 2025, the new US President
Donald Trump began abandoning previous free trade commitments and enacting unilateral tariffs on targeted goods, including those to which South Korea had substantial exposure - automobiles, automobile parts, and steel. On February 13, he ordered the preparation of broader tariffs, ostensibly to punish countries with which the United States had a trade surplus in goods. South Korea asked the United States to exclude it from new tariffs, citing low duties under the free trade agreement.
Deputy Trade Minister Park Jong-won traveled to
Washington, D.C. to make the case. Trump's so-called
Liberation Day tariffs were announced on April 2, with a 25% unilateral tariff on South Korea and a baseline 10% worldwide tariff. This rate took effect for a few hours on April 9,
crashing US financial markets. Trump paused the high per-country rates and gave several extensions. South Korea negotiated a 15% tariff, and promised a $350 billion investment in the United States. The new rate took effect on August 7, 2025. The
Bank of Korea projected this would reduce the growth of the South Korean economy by 0.45% in 2025 and 0.6% in 2026. ==United States reactions==