President Barack Obama said on Saturday a deal between Iran and world powers was a big first step toward a comprehensive solution to Iran's nuclear program as he launched a sales effort to convince critics in the US Congress to go along with the agreement.
"There are substantial limitations which will help prevent Iran from building a nuclear weapon," Obama argued in a late-night appearance at the White House after the deal was sealed in Geneva. "Simply put, they cut off Iran's most likely paths to a bomb."
Some of the initial reaction from some members of Congress reflected a willingness to take a look at the agreement after weeks of criticism from lawmakers and key US allies Israel and Saudi Arabia.
Influential Republican Senator Lindsey Graham said on CNN that Congress would likely hold off on new sanctions for six months if Iran sticks to its part of the deal. Senate Majority Leader Harry Reid, an Obama ally, said in recent days that the Senate would pursue new sanctions.
"I think you'll see the Congress impose additional sanctions, it won't take place for six months with some conditions. If Iran meets certain conditions they will never go into effect at all," Graham said.
Democrat Representative Eliot Engel, the top Democratic on House of Representatives Foreign Affairs Committee, expressed concern about the deal. He was a lead co-sponsor of the new Iran sanctions act that passed the House on July 31 and has not yet been taken up in the Senate.
"While I am concerned that this interim agreement does not require Iran to completely halt its enrichment efforts or dismantle its centrifuges, I hope that over the next six months, Iran takes the necessary steps to finally end its quest for a nuclear weapons capability," he said.
Republican Representative Ed Royce, chairman of the House Foreign Affairs Committee, said he had serious concerns that the agreement does not meet the standards necessary to protect the United States.
"Instead of rolling back Iran's program, Tehran would be able to keep the key elements of its nuclear weapons-making capability," he said.
There was also outright scorn.
Republican Senator Mark Kirk,