Being a cat's paw whose presence in the race is useful to one candidate or another but who poses no real threat will only protect him for so long.
Once Paul himself is exposed to the kind of scrutiny he wants to turn on the others, he's toast. Major ad campaigns highlighting the details of the Paul foreign policy, the newsletter business, and the kind of people who form a large part of his following will probably be required to fully inform the electorate about just how far out of the American mainstream Paul is, but a flaying or two at the hands of Gingrich in this weekend's debates couldn't hurt.
A candidate who won't man up and accept responsibility for the contents of an entire decade of a newsletter he paid for, profited from, and listed himself as editor of is on very shaky ground attacking other candidates on the grounds of character, as he's recently been doing.
You should talk, Ron.