Donald Trump now leads a unified Republican Congress, positioning him to fulfill campaign promises more easily. However, historical patterns show that single-party control often leads to challenges, as seen in past presidencies. Trump succeeded with tax reforms but faced significant obstacles, such as failed attempts to repeal the Affordable Care Act and pass an infrastructure bill. Meanwhile, Biden’s achievements were also limited despite Democratic control. Furthermore, Senate procedures require bipartisan support for passing legislation, as bills often need a three-fifths majority to overcome the filibuster, complicating unilateral governance.