“What I’m most proud of is we’ve kept the pure integrity of the process in place and the President cannot lift, while Congress is reviewing this, cannot lift the congressionally mandated sanctions, which is what they’ve been trying to do and push for over the past couple of weeks,” Corker told reporters as he headed into a classified briefing on the emerging Iran agreement with Secretary of State john Kerry and other top administration officials.”While Corker said that “no one should ever count their chickens before they hatch,” he expressed optimism that when the bill comes up for a vote in the committee later Tuesday it would pass, as expected.

According to a Corker aide familiar with the details of the bill, it requires the President to submit the final agreement to Congress, which will have up to 52 days to review and approve the deal. That includes an initial review period of 30 days, with 12 more days added automatically if Congress passes a bill and sends it to the president and an additional 10 days of congressional review if Obama vetoes the legislation.