As Americans learn the dangerous details of President Obama’s deal with Iran, Republican leaders should admit their mistake in passing Senator Bob Corker’s (R-TN) bill that reversed the process for treaty ratification. Instead of a treaty requiring approval from two-thirds of the Senate, the Corker bill allows the Iran deal to be disapproved by a simple majority in both houses-subject to a certain presidential veto, which requires two-thirds of both houses to override.