WASHINGTON — The Home handed laws on Wednesday aimed toward bulking up the federal authorities’s efforts to fight home terrorism, performing over the opposition of Republicans days after a gunman motivated by white supremacist ideology killed 10 Black individuals in a Buffalo grocery store.

Lawmakers superior the bipartisan laws on a virtually party-line vote of 222 to 203 that mirrored deep polarization about addressing white supremacy and different racially motivated extremism that’s now thought-about the nation’s best inner menace.

The vote got here because the Buffalo bloodbath has shone a highlight on how racist conspiracy theories such because the one which motivated the shooter have more and more drifted into Republican politics and right-wing media, the place outstanding voices, together with some members of Congress, have subtly echoed or overtly embraced them. Just one Republican, Consultant Adam Kinzinger of Illinois, voted for the invoice.

The measure would set up three new places of work — one every within the F.B.I., the Justice Division and the Division of Homeland Safety — to watch, examine and prosecute home terrorism. It might require biannual stories assessing the home terrorism menace posed by white supremacists, with a specific give attention to combating “white supremacist and neo-Nazi infiltration of the uniformed providers.”

But it could cease in need of creating new federal powers to crack down on home terrorism; it could not create new legal offenses or new lists of designated home terrorist teams, nor would it not give regulation enforcement further investigative powers.

Proponents mentioned that in a Congress that has lengthy been paralyzed on laws to fight gun violence, the invoice was one of the best they may to deal with the basis causes of the racist capturing rampage in Buffalo.

“The rise of racially motivated extremism is a severe menace to People throughout the nation,” mentioned Consultant Brad Schneider, Democrat of Illinois and the lead sponsor of the invoice. “We will’t cease the likes of Tucker Carlson from spewing hateful, harmful, substitute concept ideology throughout the airwaves. Congress hasn’t been capable of ban the sale of assault weapons. The Home Terrorism Prevention Act is what Congress can do to assist stop future Buffalo shootings.”

Senator Chuck Schumer, Democrat of New York and the bulk chief, mentioned he would attempt to convey up the laws within the Senate subsequent week. However Republicans are anticipated to dam it, citing considerations that it could give the Justice Division an excessive amount of energy. Home Republican leaders advisable on Wednesday that their members oppose it.

“This laws expands the federal paperwork, it ignores new and evolving terrorist threats, and it makes it harder for regulation enforcement to recruit and retain certified candidates,” mentioned Consultant Man Reschenthaler, Republican of Pennsylvania.

Initially launched in 2017, the invoice handed the Home unanimously in 2020 solely to stall within the Senate. It confronted headwinds earlier this yr after progressive Democrats in Congress, led by Consultant Cori Bush of Missouri, mentioned they might oppose the invoice, citing considerations from teams together with the American Civil Liberties Union and the Council on American-Islamic Relations that it could improve surveillance of individuals of colour, particularly activists.

The A.C.L.U. opposed an earlier model of the laws, stating in a 2019 letter that it could “entrench longstanding issues, and end result within the additional unjustified and discriminatory surveillance, investigation, and prosecution of individuals of colour and different marginalized communities, together with these engaged in First Modification protected actions.”

However the measure has picked up momentum since Saturday, when an 18-year-old white gunman opened hearth on the Tops grocery store in East Buffalo, authorities mentioned, in a premeditated effort to kill Black individuals, pushed by the assumption that white People have been prone to being changed by individuals of colour.

Democrats negotiated internally to amend the invoice to assuage the considerations of progressives, narrowing the definition of home terrorism and including a provision to ensure that people couldn’t be put beneath surveillance for the mere act of collaborating in a protest.

Legal professional Normal Merrick B. Garland and Homeland Safety Secretary Alejandro N. Mayorkas testified earlier than Congress final yr that the best domestic threat going through america got here from what they referred to as “racially or ethnically motivated violent extremists.”

In a separate warning final yr, the Division of Homeland Safety mentioned publicly for the primary time that america confronted a rising menace from “violent home extremists” emboldened by the Jan. 6 assault on the Capitol.

Senate sponsors of laws framed the invoice final yr as a means to reply to the assault on Congress.

“After the violence of the Capitol riots, it’s time to combat home terrorism,” Senator Richard J. Durbin, Democrat of Illinois, wrote in an op-ed selling the laws.

However with the Buffalo killings recent within the nation’s consciousness, congressional Democrats have pivoted to painting the laws as a response to the spate of racist shootings throughout the nation. They’ve cited the attack on the Tree of Life Synagogue in Pittsburgh, the Atlanta shootings that targeted women working at Asian spas, and the 2019 capturing in El Paso, by which authorities say a white gunman killed 22 individuals at a Walmart, claiming he was finishing up the assault in “response to the Hispanic invasion of Texas.”

“The longer we wait in getting the sources and instruments to the F.B.I., D.O.J. and D.H.S.,” Mr. Schneider mentioned, “the extra seemingly we’re to have extra occasions like in Buffalo.”