Some are expected to have smooth confirmation paths, like Sen. Marco Rubio for secretary of state, while others, like defense secretary pick Pete Hegseth, face headwinds.

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.

As Senate confirmation hearings begin, here's the latest on who in the Trump administration has, will or doesn't need to be approved.