Democrats ripped Republicans on Monday evening after lawmakers rejected gun control proposals approximately a week after the deadliest mass shooting in U.S. history.

"I'm mortified by today's vote, but I'm not surprised by it," Sen. Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D-Conn.), who led a 15-hour filibuster on the Senate floor last week, told reporters. "We learned in the months after Sandy Hook that the [National Rifle Association] has a vice-like grip on this place."

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Sen. Bill Nelson Clarence (Bill) William NelsonDemocrats sound alarm on possible election chaos Trump, facing trouble in Florida, goes all in NASA names DC headquarters after agency's first Black female engineer Mary W. Jackson MORE (D-Fla.) added that "the NRA won again."

Their comments come after senators rejected a Democratic proposal to expand background checks, as well as a measure from Sen. Dianne Feinstein Dianne Emiel FeinsteinMcConnell says Trump nominee to replace Ginsburg will get Senate vote Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Intensifying natural disasters do little to move needle on climate efforts MORE (D-Calif.) to block individuals from buying a gun when there is a "reasonable suspicion" they have been or will be involved in a terrorist attack.

Republicans argued both of the Democratic proposals were too broad.

They offered a background check measure from Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE (R-Iowa) and a separate amendment from Sen. John Cornyn John CornynCalls grow for Biden to expand election map in final sprint Bipartisan praise pours in after Ginsburg's death Chamber of Commerce endorses McSally for reelection MORE (R-Texas) to temporarily allow the attorney general to delay the sale of the gun and let a court decide if the sale should be permanently blocked.

Both of the GOP proposals also failed when Democrats — and some Republicans — voted against them.

A CNN/ORC International poll released Monday found that 85 percent of Americans support blocking individuals on the terrorist watchlist from being able to buy a gun.

More than 90 percent of Americans support requiring a background check on all gun sales to find out if the prospective buyer has been convicted of a felony, according to the same poll.

Democratic senators pointed to the poll Monday evening, arguing that Republicans could face political repercussions for their votes.

Sen. Richard Blumenthal (D-Conn.) said the "political dynamic of the nation has changed" since the December 2012 Sandy Hook Elementary School shooting in Newtown, Conn.

"I don't think democracy allows for this Congress to be so out of step with the American public for very long,” Murphy added.

GOP Sens. Mark Kirk Mark Steven KirkLiberal veterans group urges Biden to name Duckworth VP On the Trail: Senate GOP hopefuls tie themselves to Trump Biden campaign releases video to explain 'what really happened in Ukraine' MORE (Ill.) and Kelly Ayotte Kelly Ann AyotteBottom line Bottom line Bottom Line MORE (N.H.), who both face difficult reelection bids in states previously carried by Obama, voted for Feinstein's proposal.

"Unfortunately, where we find ourselves is our typical political football, though. And I believe we should stop playing political football with something so important," Ayotte said ahead of Monday's vote.

Ayotte has been working with GOP Sen. Susan Collins Susan Margaret CollinsJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally Momentum growing among Republicans for Supreme Court vote before Election Day MORE (R-Maine) on legislation expected to be rolled out Tuesday.

But Minority Leader Harry Reid Harry Mason ReidGraham signals support for confirming a Supreme Court nominee this year Trump signals he will move to replace Ginsburg 'without delay' Senate Republicans signal openness to working with Biden MORE (D-Nev.) singled out Ayotte in the Democratic press conference Monday evening, saying she's "doing everything but yoga on the Senate floor to justify what she's doing."

Kirk also voted against the Grassley and Cornyn proposals and for Murphy's background check measure.

The Senate's fight over gun control comes after a mass shooting at an Orlando gay nightclub — where Omar Mateen killed 49 people and injured 53 more — sparked a larger debate over tougher gun laws. That fight has spilled over into the 2016 fight, where Republicans are defending 24 Senate seats.

Katie McGinty, who is hoping to unseat Sen. Pat Toomey (R-Pa.), has repeatedly called on Toomey to support the Democratic proposals.

“Today was our chance to find out which members of the Senate are serious about actually doing something to stop gun violence and which members aren't. Pat Toomey's votes today show that he is long on rhetoric but short on action," she said in a statement Monday evening.

Toomey has offered his own gun control proposal in the wake of the Florida shooting and said Monday that either his measure or a forthcoming bill from Collins should be allowed to have a vote.

Former Ohio Gov. Ted Strickland, a Democrat running against Sen. Rob Portman Robert (Rob) Jones PortmanRomney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery House passes B bill to boost Postal Service MORE (R-Ohio), also called Monday's votes "another tragic example of how [Portman] is pushing the agenda of his rich and powerful friends and the Washington power brokers he serves."

Both Portman and Toomey voted for the Cornyn and Grassley amendments.