WASHINGTON, D.C. — The Senate is preparing its transition to a Republican majority after the GOP flipped at least four Democratic seats, including the one held by Sen. Sherrod Brown, D-Ohio.

Minority Leader Mitch McConnell hosted the five new GOP Senators—Jim Justice of West Virginia, John Curtis of Utah, Jim Banks of Indiana, Bernie Moreno of Ohio, Tim Sheehy of Montana and Dave McCormick of Pennsylvania—at his office on Tuesday.

McConnell, the longest-serving Senate party leader in American history, will step down from his post in January.

“As all of you know, I’ll be leaving this office after 18 years,” McConnell said at the meeting. “I’ve been the minority leader. I’ve been the majority leader. Majority is a lot better. And I’m so happy that all of our new members are here to create a majority and give us a chance to make a kind of changes for America and the voters going forward.”

The first order of business for the new Senators: voting for a Republican Party leader to replace McConnell.

The top contenders are Sens. John Thune, R-S.D., John Cornyn, R-Tex. and Rick Scott, R-Fl.

Moreno said he has not yet decided who he will support, but will make a decision after attending a candidate forum Tuesday night and another presentation Wednesday morning.

“This is super consequential for me because of two terms,” Moreno said, referring to his pledge to limit himself to two six-year terms in the Senate. “This could be the only majority leader that I serve under, so I want to make the right decision.”

Another factor for Moreno could be whether President-elect Donald Trump or Vice President-elect JD Vance endorses one of the candidates.

Vance, who is still a senator, can vote in the leadership race if he chooses. His office had no comment on whether he would vote and, if so, who he would support.

The GOP Senate leader is chosen by secret ballot, so Senators do not have to disclose their choices.

Meanwhile Majority Leader Chuck Schumer, in his first remarks on the Senate floor since the election, praised outgoing Sens. Sherrod Brown and John Tester.

“Control of this chamber will change from one party to the other,” Schumer said. “To Senator Brown and Senator Tester, we could not be prouder of the races you ran. More importantly, we could not be prouder of the legacy you have built here in the United States Senate.”