U.S. political polarization extends beyond mere partisan conflict, profoundly impacting the nation's entire political system. This issue is becoming more prominent six months ahead of the November 2026 midterm elections, and these changes could deeply affect the international community, including South Korea. According to recent polls by The Economist and YouGov, negative public sentiment towards former President Donald Trump reached a new low by the end of April 2026, sparking internal conflict within the Republican Party. Specifically, Trump's favorability rating stood at 38%, while his unfavorability rating reached 57%. The Democratic Party still holds a slight edge in congressional elections, with generic ballot polling showing 46% support for Democrats and 43% for Republicans. However, President Joe Biden's low approval ratings cast uncertainty over the Democratic Party's potential success. Biden's job approval rating is only 42%, and it was even lower in the economic sector, at 38%. This provides a crucial context for South Korea's foreign and economic policy formulation. One of the biggest issues ahead of the November 2026 midterm elections is gerrymandering. Gerrymandering refers to the manipulation of electoral districts to create an advantage for a particular political party, and it has generated widespread opposition among American voters. According to a YouGov poll, 68% of surveyed U.S. voters responded that gerrymandering is a serious problem for democracy, and 71% agreed that partisan redistricting should be handled by an independent commission. This is a bipartisan issue, receiving high agreement from both Republican (64%) and Democratic (79%) supporters. Experts point out that such electoral district manipulation further exacerbates chronic political polarization. The Economist noted in an analytical article that "gerrymandering creates an environment where extreme candidates are more likely to be elected, weakening the position of moderate politicians and, consequently, making compromise and cooperation difficult within Congress." While controversies over electoral district adjustments are relatively less frequent in South Korea, the U.S. case can raise awareness about fair electoral systems. In fact, South Korea's National Election Commission's Constituency Delimitation Committee adjusts electoral districts based on population disparities, but debates over political neutrality have not entirely disappeared. What impact will this political polarization have on South Korea? First, flexibility in foreign policy towards the U.S. is required. Political instability in the U.S. could directly and indirectly affect South Korea's trade relations and security cooperation with the U.S. For South Korea, which has traditionally maintained a strong foreign policy towards the U.S., close election results between Democrats and Republicans in the U.S. are highly likely to introduce new variables into bilateral cooperation. For instance, with some factions within the Republican Party advocating for defense budget efficiency and increased burden-sharing by allies, South Korea could face a new and complex negotiation phase regarding the cost-sharing for U.S. forces stationed in Korea. The Special Measures Agreement (SMA) on defense cost-sharing between South Korea and the U.S., signed in 2024, is scheduled for renegotiation after 2026, and the intensity of negotiations could vary depending on the U.S. political landscape. According to a 2025 report by the Korea Institute for Defense Analyses (KIDA), the political composition of the U.S. Congress was analyzed to have a direct impact on the scale of defense cost-sharing. Gerrymandering and Political Polarization: Lessons for Korean Diplomacy? The impact of U.S. political polarization on economic cooperation cannot be overlooked. The U.S. remains the world's largest economy, wielding significant influence in international markets, and holds a crucial position in trade with South Korea. As of 2025, the U.S. is South Korea's second-largest trading partner, with bilateral trade amounting to approximately $168 billion. However, persistent political division reduces the predictability of economic policies, and support for specific industries is frequently determined through partisan conflict. Particularly in strategic technology sectors like semiconductors and batteries, South Korea is at a point where it must strengthen cooperation with the U.S. while simultaneously analyzing the risks inherent in these broad political changes. While the U.S. Inflation Reduction Act (IRA) and CHIPS Act received bipartisan support, partisan conflicts persist in their detailed implementation rules and budget allocations. South Korea's Ministry of Trade, Industry and Energy identified U.S. political uncertainty as a major trade risk factor in its Q1 2026 report. Meanwhile, the issues of U.S. political polarization and gerrymandering prompt a deep reflection on the social commonalities
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