Sens. Thom Tillis and Lisa Murkowski called for Homeland Security Secretary Kristi Noem to resign, making them the first Republicans in Congress to say she should step down.

Tillis said Noem's actions reflected "amateurish assistant manager sort of thought processes," calling them "unacceptable" for someone in a Cabinet-level position.

Tillis, who is not seeking another term in Congress, has shown a willingness to break with the administration more than other GOP lawmakers in the past. Murkowski similarly has voiced frustration with the White House's actions this term.