I’ll tell you one big way: he convinced the normally intelligent Cuban delegation in Congress, primarily Senator Martinez, to endorse him in the Florida primary.
Mitt Romney was set to win Florida—and would have had the Michigan and Florida delegates—but the Cuban vote went overwhelmingly for McCain.
I think McCain or a sycophant of his spread some rumor (I forget the content now) about Romney a week or so before the vote in Florida.
We are stuck with McCain. He can do himself some good by picking a CONSERVATIVE running mate...and letting his VEEP have some say in his administration.
You know what’s possibly even scarier in what you said?
That blocks of voters are swayed by an endorsement from a politician.