“Our president said in 2012 that his administration has Israel’s back,” Graham said ahead of the vote. “This is a chance for the Senate to also say we have Israel’s back.”

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Menendez said Iran was the “the paramount national security challenge we face.”

S.Res. 65 also supports the full implementation of U.S. and international sanctions on Iran, which Graham said have been working but too slowly.

“This is about preventing Iran from getting a nuclear weapon,” Sen. John HoevenJohn Henry HoevenSenate Republicans call on Trump to preserve NAFTA GOP anxious with Trump on trade GOP lawmakers to Trump: Don't fire Mueller MORE (R-N.D.) said. “If Iran can’t sell their oil, they won’t have revenue and won’t be able to build a nuclear weapon.”

The resolution says, “if Israel is compelled to take military action in self-defense against Iran's nuclear weapons program, the U.S. government should provide Israel with diplomatic, military and economic support.”

The resolution expressly says it’s not a declaration of war.

“Today the Senate will send a clear and unequivocal message to Iran,” Sen. John McCainJohn Sidney McCainMcConnell: 'Whoever gets to 60 wins' on immigration Meghan McCain: Melania is 'my favorite Trump, by far' Kelly says Trump not likely to extend DACA deadline MORE (R-Ariz.) said. “The United States will not allow you to get nuclear weapon capability.”

Menendez, the Senate Foreign Affairs Committee chairman, said his committee would continue to look at other options, including increasing military pressure, in order to keep Iran from getting a nuclear weapon.