President Trump on Monday accused Senate Minority Leader Charles Schumer Chuck SchumerVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Graham signals support for confirming a Supreme Court nominee this year Pelosi orders Capitol flags at half-staff to honor Ginsburg MORE (D-N.Y.) of hypocrisy for opposing his decision not to certify Iran's compliance with the nuclear deal negotiated during the Obama administration.

“Dem Senator Schumer hated the Iran deal made by President Obama, but now that I am involved, he is OK with it. Tell that to Israel, Chuck!” Trump wrote on Twitter.

Schumer voted in favor of a motion to disapprove of the Iran nuclear deal, which he opposed as negotiated.

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But he has since offered support for keeping the deal in place, arguing that with sanctions on Iran previously imposed by the United States and its allies now lifted, it would make little sense for the U.S. to move away from the deal on its own.

“The @SenateDems agree with #SecDef Mattis and General Dunford. We won't allow the Iran deal to be undone,” Schumer said Friday.

Schumer referenced Defense Secretary James Mattis James Norman MattisBiden courts veterans amid fallout from Trump military controversies Trump says he wanted to take out Syria's Assad but Mattis opposed it Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE and Joint Chief of Staff Chairman Joseph Dunford, who reportedly support keeping the Iran deal in place.

Trump's decision to decertify does not kill the Iran deal, but it does provide for a 60-day window for Congress to reimpose sanctions previously lifted on Iran. Trump has not called for those sanctions to be put back into place.