Obama's Iran deal is now near certain to survive Congress

As Congress's vote on a resolution to disapprove the administration's nuclear deal draws ever nearer, the math for President Obama is looking better and better.

The magic number of Senate supporters the president needs to ensure that the deal stands is 34. Currently, he has 30. So he needs to pick up just four more to preserve the agreement — and there are still 14 remaining undecided Democrats in the chamber, several of whom have already made positive comments about the deal. So Obama has a lot of options.