So you know someone who is/has been elected a candidate has to endorse the party candidate in a general election of face the consequences. i’m not saying it’s right, but that’s how it is. Someone who changes their registration all the time and is a loose cannon is not in the same circumstance. And if you reregister in order to vote for someone, that’s kind of a statement.
John McCain, not Mitt Romney, was the nominee in 2008. I told you to note the date on that Santorum graphic.