Editor’s note: This article is the first in a three-part Korea Pro analysis series examining how the Democratic takeover of the U.S. Congress could reshape South Korea’s economic and security relationship with Washington. Part two will examine the implications for the bilateral alliance, defense cooperation and Seoul’s influence in Washington. Part three will assess the consequences for Korean companies and their investments in the U.S.

The Democratic Party’s capture of both chambers of U.S. Congresscould subject South Korea’s $350 billion investment agreement to additional requirements, complicating Seoul’s efforts to protect its capital even as opposition lawmakers challenge President Donald