Mick Mulvaney was sworn in Thursday night as President Trump's pick to lead the Office of Management and Budget (OMB).
Vice President Pence administered the oath of office to Mulvaney, calling the South Carolina GOP lawmaker "a happy warrior on behalf of fiscal responsibility."
"Mick, President Trump has asked you to lead the Office of Management and Budget, a vital role in a day and age of deficits and debt," Pence said.
"And we're both very confident that your leadership, your integrity, and your commitment to protecting America’s fiscal and economic future will serve all the people of the United States with great distinction."
"Voting in favor of Congressman Mulvaney’s nomination would be asking Secretary Mattis to spend less time fighting our enemies overseas and more time fighting inside-the-Beltway budget battles with an OMB director," McCain said Wednesday on the Senate floor.
Two other Senate Republicans — Sens. Susan CollinsSusan CollinsSenate braces for fallout over Supreme Court fight Overnight Finance: WH wants to slash billions | Border wall funding likely on hold | Wells Fargo to pay 0M over unauthorized accounts | Dems debate revamping consumer board Lawmakers call for pilot program to test for energy sector vulnerabilities MORE (Maine) and Thad CochranThad CochranOvernight Defense: FBI chief confirms Trump campaign, Russia probe | Senators push for Afghan visas | Problems persist at veterans' suicide hotline Senators ask to include visas for Afghans in spending bill Shutdown politics return to the Senate MORE (Miss.) — had previously expressed reservations about Mulvaney's nomination, but ultimately voted to confirm him.