One of the odder political subplots of President Obama's term so far has been his relationship with the tourism-dependent city of Las Vegas. A year ago, Obama irked Nevadans by demanding that corporations not use federal bailout money for trips to Vegas. A couple of weeks ago he infuriated them again by telling a New Hampshire audience to save their cash for college instead of “blowing” it in Vegas. No Nevadans were more annoyed, of course, than the state's Democratic politicians, among them Senate Majority Leader Harry Reid, who faces an uphill fight for re-election this fall. So now the...