President Obama thanked a group of veterans Thursday for backing the Iran nuclear agreement, saying they understand it is a good diplomatic alternative to the prospect of a military confrontation with Tehran.

"They know the consequences when we rush into war," Obama said after meeting with veterans who support the Iran deal.

Obama and aides have repeatedly warned that war could result if congressional Republicans somehow block the deal in which the U.S. and allies end economic sanctions on Iran as it gives up the means to make nuclear weapons.

It seems likely the deal with go through. This week, the Obama administration secured enough support in Congress to sustain a veto of any resolution of disapproval, should Republicans be able to pass one.

Republicans and other critics say the agreement leaves too much room for Iran to cheat and pursue nuclear weapons it could use to back up its threats against Israel. They have called for intensified sanctions on Iran.

Obama and Secretary of State John Kerry met at the White House with veterans and Gold Star mothers who have lost friends and children in combat. His guests have lobbied lawmakers to support the Iran deal, the president said.

The supporters do not trust Iran, Obama said, but see the deal as "strong and principled diplomacy" that can head off any kind of war against Iran's nuclear program.

"We have to try to resolve problems without military force," Obama said.

By USA Today