WASHINGTON >> The Senate easily approved a bipartisan gun violence bill today that seemed unthinkable a month ago, setting up final approval of what will be Congress’ most far-reaching response in decades to the nation’s run of brutal mass shootings.

After years futile Democratic efforts to curb firearms, 15 Republicans joined with them as both sides decided inaction was untenable after last month’s rampages in Buffalo, New York and Uvalde, Texas. It took weeks of closed-door talks but senators emerged with a compromise embodying incremental but impactful movement to curb bloodshed that has come to regularly shock — yet no longer surprise — the nation.

The $13 billion measure would toughen background checks for the youngest gun buyers, keep firearms from more domestic violence offenders and help states put in place red flag laws that make it easier for authorities to take weapons from people adjudged dangerous. It would also fund local programs for school safety, mental health and violence prevention.

“Families in Uvalde and Buffalo, and too many tragic shootings before, have demanded action. And tonight, we acted,” President Joe Biden said after passage. He said the House should send it to him quickly, adding, “Kids in schools and communities will be safer because of it.”

The election-year package fell far short of more robust gun restrictions Democrats have sought and Republicans have thwarted for years, including bans on the assault-type weapons and high-capacity ammunition magazines used in the slayings in Buffaloand Uvalde. Yet the accord let leaders of both parties declare victory and demonstrate to voters that they know how to compromise and make government work, while also leaving room for each side to appeal to its core supporters.

“This is not a cure-all for the all the ways gun violence affects our nation,” said Senate Majority Leader Chuck Schumer, D-N.Y., whose party has made gun restrictions a goal for decades. “But it is a long overdue step in the right direction.”

Senate Minority Leader Mitch McConnell, R-Ky., in a nod to the Second Amendment right to bear arms that drives many conservative voters, said “the American people want their constitutional rights protected and their kids to be safe in school.” He said “they want both of those things at once, and that is just what the bill before the Senate will have accomplished.”

The day proved bittersweet for advocates of curtailing gun violence. Underscoring the enduring potency of conservative cIout, the right-leaning Supreme Court issued a decision expanding the right of Americans to carry arms in public by striking down a New York law requiring people to prove a need for carrying a weapon before they get a license to do so.

McConnell hailed the justices’ decision and Senate passage of the guns bill as “complementary victories that will make our country freer and safer at the same time.”

The Senate vote on final passage was 65-33. A cluster of House Democrats who watched the vote in the chamber’s rear included Rep. Lucy McBath, D-Ga., whose 17-year old son was shot to death in 2012 by a man complaining his music was too loud.

In the key roll call hours earlier, senators voted 65-34 to end a filibuster by conservative GOP senators. That was five more than the 60-vote threshold needed. The House planned to vote Friday and approval seemed certain.

On both votes, 15 Senate Republicans joined all 50 Democrats, including their two allied independents, in backing the legislation.

Yet the votes highlighted the risks Republicans face by defying the party’s pro-gun voters and firearms groups like the National Rifle Association. Sens. Lisa Murkowski of Alaska and Todd Young of Indiana were the only two of the 15 up for reelection this fall. Of the rest, four are retiring and eight don’t face voters until 2026.

Tellingly, GOP senators voting “no” included potential 2024 presidential contenders like Ted Cruz of Texas, Josh Hawley of Missouri and Tim Scott of South Carolina. Some of the party’s most conservative members voted “no” as well, including Sens. Rand Paul of Kentucky and Mike Lee of Utah.

Cruz said the legislation would “disarm law-abiding citizens rather than take serious measures to protect our children.”

John Feinblatt, president of Everytown for Gun Safety, hailed senators who supported the measure for “coming together and putting the safety of the American people ahead of gun lobby priorities.”

While the Senate measure was a clear breakthrough, the outlook for continued congressional movement on gun curbs is dim.

Less than one-third of the Senate’s 50 GOP senators backed the measure and solid Republican opposition is certain in the House. Top House Republicans urged a “no” vote in an email from the No. 2 GOP leader, Rep. Steve Scalise of Louisiana, that called the bill “an effort to slowly chip away at law-abiding citizens’ 2nd Amendment rights.”

Both chambers — now narrowly controlled by Democrats — could well be run by the GOP after November’s midterm elections.

Senate action came one month after a gunman killed 19 students and two teachers in Uvalde. Just days before that, a white man was accused of being motivated by racism as he killed 10 Black grocery shoppers in Buffalo. Both shooters were 18 years old, a youthful profile shared by many mass shooters, and the close timing of the two slaughters and victims with whom many could identify stirred a demand by voters for action, lawmakers of both parties said.

The talks were led by Sens. Chris Murphy, D-Conn., Kyrsten Sinema, D-Ariz., John Cornyn, R-Texas, and Thom Tillis, R-N.C. Murphy represented Newtown, Connecticut, when an assailant killed 20 students and six staffers at Sandy Hook Elementary School in 2012, while Cornyn has been involved in past gun talks following mass shootings in his state and is close to McConnell.

Murphy said the measure would save thousands of lives and was a chance to “prove to a weary American public that democracy is not so broken that it is unable to rise to the moment.”

“I don’t believe in doing nothing in the face of what we saw in Uvalde” and elsewhere, Cornyn said.

The bill would make the local juvenile records of people age 18 to 20 available during required federal background checks when they attempt to buy guns. Those examinations, currently limited to three days, would last up to a maximum of 10 days to give federal and local officials time to search records.

People convicted of domestic abuse who are current or former romantic partners of the victim would be prohibited from acquiring firearms, closing the so-called “boyfriend loophole.”

That ban currently only applies to people married to, living with or who have had children with the victim. The compromise bill would extend that to those considered to have had “a continuing serious relationship.”

There would be money to help states enforce red flag laws and for other states without them that for violence prevention programs. Nineteen states and the District of Columbia have such laws.

The measure expands the use of background checks by rewriting the definition of the federally licensed gun dealers required to conduct them. Penalties for gun trafficking are strengthened, billions of dollars are provided for behavioral health clinics and school mental health programs and there’s money for school safety initiatives, though not for personnel to use a “dangerous weapon.”