I think the contestants, the judges, the public and, more importantly, Ann herself realise that it would be a travesty if she were to win. She's entertaining but she's not a particularly good dancer and this show is (or should be) about picking the best dancers.
She's not stupid, and she's no stranger to being opposed and even laughed at in the past, so I really don't think this will worry her too much, Matt. Like many of them, she's on that show for exposure. She sees a career as a TV personality rather than as politician and this his how she's going to show she can do it.
I think she will do a John Sargent. She'll go so far and then, if the public still votes for her, will bow out gracefully.
And if she's done nothing else, she's shown that the older, more portly and less athletic among us can still enjoy and benefit from dancing.