On Wednesday, May 6, the Senate Judiciary Committee will hold a hearing for one of President Donald Trump's most important judicial nominees. Judge Justin Walker, who currently serves on the U.S. District Court in Kentucky, has been nominated to fill one of the infrequent vacancies on the U.S Court of Appeals for the D.C. Circuit, the most important court in the nation after the Supreme Court. The D.C. Circuit hears many of the cases that determine the limits on the authority of the president and executive agencies, and the relationship between the three branches. Because of this court's importance, Senate Democrats and their allies are already fiercely attacking Walker's nomination.