Senate Democrats blocked a resolution disapproving the Iran nuclear deal for a third time Thursday, sealing a major foreign policy victory for President Obama.



Senators voted 56-42 against ending debate on the resolution of disapproval, falling short of the 60 votes needed on the procedural motion.

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Democratic Sens. Ben Cardin Benjamin (Ben) Louis CardinClyburn pushes next steps on criminal justice reform The Hill's Morning Report - Dems appear to have votes to counter Trump on emergency The Hill's 12:30 Report: Trump looks for boost from Korea summit MORE (Md.), Joe Manchin Joseph (Joe) ManchinThe Hill's Morning Report - Dems appear to have votes to counter Trump on emergency Border rebuke looms for Trump Trump claims Democrats ‘don’t mind executing babies after birth’ after blocked abortion bill MORE (W.Va.), Bob Menendez Robert (Bob) MenendezActing Defense chief calls Graham an 'ally' after tense exchange William Barr is right man for the times This week: Trump delivers State of the Union amid wall fight MORE (N.J.) and Charles Schumer Charles (Chuck) Ellis SchumerBrady gun control group gets rebranding Brennan fires back at 'selfish' Trump over Harry Reid criticism Trump rips Harry Reid for 'failed career' after ex-Dem leader slams him in interview MORE (N.Y.) for a third time bucked Obama and voted "no" on the deal.

GOP Sens. Rand Paul Randal (Rand) Howard PaulWhite House pleads with Senate GOP on emergency declaration The Hill's Morning Report — Emergency declaration to test GOP loyalty to Trump The Hill's 12:30 Report: Trump escalates fight with NY Times MORE (Ky.) and Marco Rubio Marco Antonio RubioWhite House pleads with Senate GOP on emergency declaration Sixteen years later, let's finally heed the call of the 9/11 Commission Schumer urges GOP to reject Trump's 'destructive' national emergency MORE (Fla.) missed the vote, while Sens. Ted Cruz Rafael (Ted) Edward CruzCornyn less popular than Cruz in Texas: poll Trump unleashing digital juggernaut ahead of 2020 Inviting Kim Jong Un to Washington MORE (Texas) and Lindsey Graham Lindsey Olin GrahamWhite House pleads with Senate GOP on emergency declaration GOP lawmaker says panel to investigate drug company gaming of patent system Sixteen years later, let's finally heed the call of the 9/11 Commission MORE (S.C.) voted to end debate. All four took part in Wednesday night's Republican presidential debate in California.

The vote came just hours ahead of the deadline for lawmakers to pass a resolution on the deal. With neither chamber of Congress expected to take another vote on Iran, the administration is poised to protect the agreement after months of intense lobbying aimed at solidifying Democratic support.



Opponents of the deal appeared to acknowledge defeat ahead of Thursday's vote.



"This agreement is moving forward, we all know that," Cardin, the ranking member of the Foreign Relations Committee, said, adding that lawmakers should now focus on next steps to strengthen the agreement.



Sen. Bob Corker Robert (Bob) Phillips CorkerBrexit and exit: A transatlantic comparison Sasse’s jabs at Trump spark talk of primary challenger RNC votes to give Trump 'undivided support' ahead of 2020 MORE (R-Tenn.), who spearheaded legislation that allows for Congress to debate and vote on the agreement, added that Republicans understand that "42 senators are causing a filibuster to take place and that we're not every going to be able to get to that vote on conscience.”



Republicans argue that Democrats are blocking the resolution in an effort to protect Obama from having to use a veto, something he's only had to use four times while in office.



Thursday's vote comes after Democrats previously blocked the resolution of disapproval from moving forward twice. Republicans had hoped that by staging repeat votes they could pressure at least two more Democrats to buck Obama and vote against the deal.



But Minority Leader Harry Reid Harry Mason ReidSenate confirms Trump court pick despite missing two 'blue slips' Can Lindsey Graham take the politics out of judicial battles? Bottom Line MORE (D-Nev.) suggested that Republicans were wasting precious floor time with only a handful of working days left ahead of an end-of-the-month deadline to avoid a government shutdown.





Reid previously offered to let the Senate move to a final vote on the Iran nuclear deal if Republicans would agree to setting a 60-vote threshold for final passage.



While McConnell rejected the deal, it's gained at least one Republican supporter: Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeBrexit and exit: A transatlantic comparison Poll: 33% of Kentucky voters approve of McConnell Trump suggests Heller lost reelection bid because he was 'hostile' during 2016 presidential campaign MORE



"Take it," he said, referring to Reid's offer. "Let's get to a final vote. We've seen the end of this movie already."



But McConnell appeared to be sticking to his strategy — even after his attempt to force a tough vote on Democrats failed.



"Democrats have chosen to deny the Senate a final vote on the president's deal with Iran. They made their choice," he said. "Democrats ensured that this would be not just Obama's deal with Iran, but the Democratic Party's deal with Iran, too." "Senator McConnell has decided to waste an entire week on something that has already been decided, twice," he said. "Despite the fact that the government will be shut down in a matter of days, the world's greatest deliberative body is doing a show vote."Reid previously offered to let the Senate move to a final vote on the Iran nuclear deal if Republicans would agree to setting a 60-vote threshold for final passage.While McConnell rejected the deal, it's gained at least one Republican supporter: Sen.(R-Ariz.), who said he wants to take a final vote "and not just have endless cloture votes.""Take it," he said, referring to Reid's offer. "Let's get to a final vote. We've seen the end of this movie already."But McConnell appeared to be sticking to his strategy — even after his attempt to force a tough vote on Democrats failed."Democrats have chosen to deny the Senate a final vote on the president's deal with Iran. They made their choice," he said. "Democrats ensured that this would be not just Obama's deal with Iran, but the Democratic Party's deal with Iran, too."

— This story was updated at 5:40 p.m.