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 is offering an amendment to an appropriations bill that would block suspected terrorists from buying guns, ahead of a showdown in the Senate next week.

Similar to a measure that failed in the Senate last year, the proposal from the Texas Republican would allow the attorney general to delay suspected terrorists from purchasing a gun for up to 72 hours while seeking a court order to stop the sale.

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Cornyn told reporters on Thursday that unlike his 2015 proposal, this measure wouldn't include a provision cracking down on cities that don't comply with federal immigration laws.

A Cornyn aide said the new proposal — offered as an amendment to a funding bill for the Commerce and Justice departments and science programs — also includes a provision allowing the attorney general to temporarily delay the sale of a gun to someone who has been the subject of a terrorism investigation in the past five years.

“I think it's pretty reasonable, and it's a good starting point if we're trying to address the real threat of Islamic extremism rearing its ugly head here at home," Cornyn said on the Senate floor Thursday.

The Texas Republican’s move comes four days after a gunman — who was formally investigated by the FBI and spent some time on a terrorist watchlist — killed 49 people at a gay nightclub in Orlando, the deadliest mass shooting in American history.

Senators are expected to vote on Cornyn's proposal, as well as a competing 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.) early next week.

Feinstein's amendment would let the attorney general block the sale of a gun with "reasonable suspicion" that someone has or will participate in a terrorist attack.

Though Republicans largely support Cornyn's proposal, a few have suggested they will offer alternatives.

Sen. Pat Toomey (R-Pa.) introduced legislation on Thursday requiring the attorney general to create a list of "likely terrorists." It would then be submitted to the Foreign Intelligence Surveillance Court, which would review the list annually and remove any Americans inadvertently included, according to a summary of the bill from his office.

The attorney general would be able to block anyone on the list from buying a gun and would be able to temporarily delay for three days anyone who is not on the list but is a "likely terrorist" from buying a gun.

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) told reporters Thursday that she is also working on a proposal.

But Democrats, so far, have shown little interest in supporting Cornyn or Toomey's measures.

"The Toomey bill it, you know, the Toomey bill could get people killed. Forcing our intelligence agencies to completely restructure the terrorist watchlist and to put these enormous delays in people arriving on it could put lives at jeopardy," 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.) told reporters Thursday.

Murphy led Democrats in a 15-hour talkathon in the Senate on Wednesday and into Thursday, delaying floor action while demanding votes on gun control legislation.