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.

Many of Trump’s nominees to serve in Cabinet and advisory roles are slated to appear this week for hearings before Senate committees, a key test for many of them.

Many nominees have met with senators individually. Now, they will go before the committees overseeing the agencies that Trump wants them to run.