Sen. Chuck Grassley was sworn in as President Pro Tempore of the Senate, putting the 91-year-old 3rd in the presidential line of succession (second for now, until a speaker has been chosen).

Sen. Joni Ernst began work with a new Defense Department official to combat military sexual assault last week.

During remarks on the Senate floor Tuesday, Sen. Chuck Grassley (R-IA) spoke about his oversight of the FBI's "Arctic Frost" case on President Trump.

Sen. Chuck Grassley was sworn in as President Pro Tempore of the Senate, putting the 91-year-old 3rd in the presidential line of succession (second for now, until a speaker has been chosen).