New Congress live updates: What's next after Kevin McCarthy's speakership win

Rep. Pete Aguilar, D-Calif., has nominated Rep. Hakeem Jeffries of New York to be the House minority leader.

Jeffries has made history as the first Black leader to be elected leader a congressional caucus. He was elected by Democrats in late November after Rep. Nancy Pelosi announced she was stepping down from the role.

"Today, madam clerk, House Democrats are united by a speaker who will people over politics," Aguilar declared, an apparent dig at Republicans as the party struggles to unite behind a candidate for speaker.

"Hakeem Jeffries has worked his entire life to improve economic opportunity for all people. He's committed to strengthening the American dream by lowering costs for working families, building safer communities by taking weapons of war off streets and by creating good-paying jobs in industries of the future."

"He does not traffic in extremism," Aguilar continued. "He does not grovel to or make excuses for a twice impeached so-called former president. Madam clerk, he does not bend a knee to everyone who would seek to undermine our democracy because, madam clerk, that's not what leaders do."

Jeffries and Pelosi greeted each other on the House floor on Tuesday.

Rep. Elise Stefanik, R-N.Y., introduced Kevin McCarthy on the House floor as the GOP nominee for speaker.

Stefanik, a McCarthy ally, touted the Californian's efforts to bolster House Republicans' ranks by campaigning for diverse candidates from coast to coast.

"Since the day Kevin was elected as our leader, House Republicans have only gained seats and won," she said. "Kevin knows what we stand for, he knows when to engage in the fight, and he knows how to build consensus."

"His relentless effort has yielded an extraordinary House Republican majority," she added. "Today's House Republican Conference is the most diverse Republican conference in our nation's history."

And while her speech was mostly focused on building up McCarthy, Stefanik also offered a dig at his detractors, boasting that "Kevin McCarthy has earned this speakership of the 'People's House.'"

Ahead of the vote for speaker, the magnetometers placed outside the doors of the House chamber in the wake of the Jan. 6 attack on the U.S. Capitol have been removed, as the new GOP majority demanded.

The GOP’s new proposed House rules had called for removing the magnetometers.

-ABC News’ Katherine Faulders, Will Steakin, and Nicole Moeder

As House Republicans enter the 118th Congress in disarray over who will hold the speaker’s gavel, the Democrat-controlled Senate opened with Vice President Kamala Harris swearing in new members and those who won reelection in November.

Among the new faces in the chamber are Pennsylvania’s John Fetterman, Alabama’s Katie Britt and Missouri’s Eric Schmitt.

Arizona’s Mark Kelly and Georgia’s Raphael Warnock were sworn in for their first full, six-year terms.

Despite losing majority control in the House, Democrats expanded their advantage in the Senate by one seat.