Sen. Roy Blunt Roy Dean BluntSCOTUS confirmation in the last month of a close election? Ugly Senate to push funding bill vote up against shutdown deadline Social media platforms put muscle into National Voter Registration Day MORE (R-Mo.) said on Sunday that President Trump needs to let lawmakers know what gun reform measures he would sign before Republicans call bills for votes.

"The president needs to step up here and set some guidelines on what he will do," Blunt said on NBC's "Meet the Press."

"Schumer has an 'everything or nothing' mentality on gun legislation," Blunt added, referring to Senate Minority Leader Chuck Schumer Chuck SchumerPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' 3 reasons why Biden is misreading the politics of court packing Cruz blocks amended resolution honoring Ginsburg over language about her dying wish MORE (D-N.Y.).

"Well, call his bluff," NBC host Chuck Todd Charles (Chuck) David ToddMurkowski: Supreme Court nominee should not be taken up before election Republican senator says plans to confirm justice before election 'completely consistent with the precedent' Sunday shows - Trump team defends coronavirus response MORE said.

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"If the president would let us know what he'd sign if it got on his desk, we'd be much more likely to do that," Blunt responded.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellDemocratic senator to party: 'A little message discipline wouldn't kill us' House to vote on resolution affirming peaceful transition of power Republican lawyers brush off Trump's election comments MORE (R-Ky.) has said that he will only call bills to a vote that Trump would support if they pass.

Gun reform activists are newly invigorated to push legislation forward after several mass shootings in the recent months.

The Democratic-controlled House passed a universal background check bill in February, but the Republican-majority Senate has not called it to a vote.

Trump had mentioned he supports universal background checks, but later walked back the comments and again reversed his position.