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.

Energy committee chairman Sen. Mike Lee postponed Burgum's hearing, saying his paperwork was unnecessarily delayed.

Donald Trump's pick for attorney general, Pam Bondi, will face a Senate panel on Wednesday where Democrats are expected to grill her over the Republican president-elect's threats to use the Justice Department to seek revenge against his political enemies.

Selections for attorney general, secretary of homeland security, secretary of state and Treasury secretary are among those set to have hearings this week.