Senate Banking Committee passes Kirk-Menendez 18-4

Here's a pretty strong indicator that the Senate has had enough with President Obama's dithering on Iran. The Senate Banking Committee on Thursday reported out the Kirk-Menendez bill that would increase sanctions on Iran. It wasn't even close. The vote was 18-4.

The Banking Committee vote suggests that the a veto-proof 68 Senators now support the Kirk-Menendez bill. Here's how that calculation comes about:

52 Republicans (everyone but Flake and Paul)
10 Democrats on the Menendez letter indicating support (Menendez, Schumer, Blumenthal, Peters, Casey, Cardin, Coons, Manchin, Donnelly, Stabenow)
3 Democrats on Banking who voted 'yes' today but weren't on the Menendez letter (Tester, Heitkamp, Warner)
3 Democrats who cosponsored Kirk-Menendez during its last iteration (Booker, Bennett, Gillibrand)

The bill has been moving forward quickly. Consider this:

Tuesday: The Senate Banking committee held hearings to discuss the legislation (that was the same day 10 Democrats signed the Menendez letter indicating support).
Tuesday (night): The legislation was introduced with 16 co-sponsors (7 Democrats and 9 Republicans, including McConnell, indicating that it has a clear path to the floor).
Thursday: The legislation got voted out of committee 18-4.

What could go wrong?