Seoul is assessing the fallout from the Democrats’ sweeping victory in the U.S. midterm elections, preparing for possible changes in trade, security and nuclear cooperation while seeking to keep existing agreements with Washington on track. “We have been continuously reviewing how to respond to shifts in the balance of power in the U.S. Senate and House,” a Cheong Wa Dae official said Thursday. “Given the complexities of Korea-U.S. relations, Cheong Wa Dae and relevant ministries are closely monitoring developments.” Presidential chief of staff Lim Kwang-hyun reporteldy instructed senior staff to develop responses to the election outcome’s potential effects on U.S. tariff policy and bilateral security cooperation. The Democratic takeover of both the Senate and the House means Seoul must maintain cooperation with U.S. President Donald Trump and the White House while strengthening ties on Capitol Hill, where lawmakers could play a greater role in scrutinizing or shaping agreements involving trade, nuclear cooperation and defense. Prime Minister Han Seong-sook also noted Thursday