WASHINGTON (AP) -- New Jersey Democratic Sen. Cory Booker announced his support for the Iran nuclear deal on Thursday, siding with President Barack Obama and bucking home-state pressures to say "no."

U.S. Sen. Cory Booker (Photo by Alex Wong/Getty Images)

In a statement, Booker detailed deep misgivings about the international agreement that aims to curb Iran's nuclear program in exchange for billions of dollars in relief from economic sanctions.

"I nonetheless believe it is better to support a deeply flawed deal, for the alternative is worse. Thus, I will vote in support of the deal," Booker said. "But the United States must recognize that to make this deal work, we must be more vigilant than ever in fighting Iranian aggression."

Booker had been closely watched because of pressures from New Jersey's Jewish community to oppose the deal. Also, New Jersey's other Democratic senator, Bob Menendez, opposes the accord.

On Wednesday, Senate Democrats clinched the needed votes to uphold Obama's veto, if necessary, of a resolution of disapproval that Republicans are trying to pass this month. Booker became the 35th Democratic or independent senator to back the deal.

Supporters are aiming to collect 41 votes in favor, which would allow them to block a final vote on the disapproval resolution in the Senate and spare Obama from resorting to a veto.

For opponents, the challenge now is the opposite: to prevent a filibuster of the agreement and ensure congressional passage of a resolution putting Congress on record against the deal, even with the certainty that the measure will be vetoed.

"Since it looked like the administration was closing in on enough votes to sustain a presidential veto we've been asking people, just in fairness, `Let this come to a vote,"' said former Democratic-turned-independent Sen. Joe Lieberman, who's rallying opposition to the deal.

House Republican leaders moved up debate on the disapproval resolution to next week, ensuring that the House will go on record against the deal shortly after Congress returns from its August recess, regardless of the outcome in the Senate. GOP lawmakers who control the House and Senate say Iran got too many concessions in the agreement.

Democratic supporters claimed a decisive 34 votes in favor of the deal in the Senate after Sen. Barbara Mikulski of Maryland called the pact "the best option available to block Iran from having a nuclear bomb."

Senate Majority Leader Mitch McConnell, R-Ky., grudgingly acknowledged that his side would not be able to block the deal, which he said leaves Iran "with a threshold nuclear capability."

Israel contends the deal would keep Iran perilously close to developing nuclear weapons while enriching a government that has funded anti-U.S. and anti-Israel militants throughout the Middle East.

White House press secretary Josh Earnest called the growing support a validation of Obama's effort to "make sure that every member of the Senate understands exactly what's included in the agreement."

The deal sets Iran back so that it is at least a year away from being able to produce enough nuclear material for a weapon, before the restrictions ease after a decade.

In Tehran on Thursday, Iran's supreme leader, Ayatollah Ali Khamenei, said "there will be no deal" if world powers merely suspend economic sanctions rather than lifting them. His remarks were read by a state TV anchorman.

Khamenei said some U.S. officials have spoken of the "suspension" of the sanctions, which he said is unacceptable. He said that Iran will only partially comply with its commitments if the sanctions are merely suspended.


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