WASHINGTON — The Senate quickly confirmed Marco Rubio as secretary of state Monday, voting unanimously to give President Donald Trump the first member of his new Cabinet on Inauguration Day.

Rubio, the Republican senator from Florida, is among the least controversial of Trump’s nominees and vote was decisive, 99-0. Another pick, John Ratcliffe for CIA director, is also expected to have a swift vote. Action on others, including former combat veteran and Fox News host Pete Hegseth for defense secretary, is expected later in the week.

“Marco Rubio is a very intelligent man with a remarkable understanding of American foreign policy,” Sen. Chuck Grassley of Iowa, the senior-most Republican, said as the chamber opened.

It’s often tradition for the Senate to convene immediately after the ceremonial pomp of the inauguration to begin putting the new president’s team in place, particularly the national security officials. During Trump’s first term, the Senate swiftly confirmed his defense and homeland security secretaries on day one, and President Joe Biden’s choice for director of national intelligence was confirmed on his own Inauguration Day.

With Trump’s return to the White House, and his Republican Party controlling majorities in Congress, his outsider Cabinet choices are more clearly falling into place, despite initial skepticism and opposition from both sides of the aisle.

Senate Majority Leader John Thune moved quickly Monday, saying he expected voting to begin “imminently” on Trump’s nominees.

Democrats have calculated it’s better for them to be seen as more willing to work with Trump, rather than simply mounting a blockade to his nominees. They’re holding their opposition for some of his other picks who have less support, including Tulsi Gabbard for director of national intelligence and vaccine skeptic Robert F. Kennedy Jr. for health secretary.