US President Barack Obama needs 34 Senators to support the deal to ensure that its opponents lack the two-thirds majority they would need to override any presidential veto on legislation to kill it. Congress is expected to vote before a September 17 deadline.
Coons said that while the deal is not perfect, he would “support this agreement and vote against any measures to disapprove it in Congress.”
Meanwhile, Casey said he agreed that the nuclear is the best option possible for US negotiators.
“This agreement will substantially constrain the Iranian nuclear program or its duration, and compared with all realistic alternatives, it is the best option available to us at this time," he wrote in an 8,000-word memorandum reported by the Philadelphia Inquirer.
With the two lawmakers’ support, 33 members of the Senate now support the agreement, while 42 Senators opposed it and 14 are undecided.
That means that the administration has only to lock down a single additional Senator to ensure the agreement will be approved.