Story highlights Schumer's comments are the latest salvo between the New York senator and a White House at odds on a centerpiece of Obama's foreign policy legacy.

The White House believes they have enough votes to sustain a presidential veto should Congress reject the Iran deal but are counting every body.

Washington (CNN) New York Sen. Chuck Schumer, the lone Senate Democrat to publicly come out against the Iran deal, suggested Tuesday that the White House deliberately leaked his decision to oppose the agreement Thursday night before he had a chance to explain his "no" vote to colleagues.

"I told the president the day before and I don't think he leaked it, but maybe somebody in the White House did, maybe somebody else did. I'm not pointing fingers," Schumer told reporters after a speech at New York University on Tuesday.

The White House has denied being behind the media leak.

Schumer's comments are the latest salvo between the New York senator and a White House at odds on a centerpiece of Obama's foreign policy legacy. Former Obama aides and progressive outside groups have harshly attacked Schumer since his position became public and have questioned whether he's fit to be the next Senate Democratic leader.

Sen. Dick Durbin of Illinois, the No. 2 Senate Democrat, threw cold water on this idea Tuesday, telling The Hill that he still supported Schumer. So far, no senators have come out against him as the next Senate Democratic leader.

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