Senators will grill Trump's choices to lead the Justice, State, Transportation and Energy departments,as well as the CIA and the top budget office.

Ratcliffe, director of national intelligence for the final months of Trump’s first term, goes before the Senate Intelligence Committee. The former Texas congressman is in line to lead the nation's premier spy agency, responsible for foreign covert operations and collecting data on U.S. adversaries.

The Senate must confirm Donald Trump's cabinet picks before those individuals can begin their first day in office. Here's a look at the process.