While she has said "Go Vote against Ubama" and has made it very clear that Romney should be your choice.
She knows Moderate Mitt will end up betraying Conservatives if he gets in and if she goes around yelling "VOTE 4 ROMNEY" for 7 months than her credibly when she/we need to stand up to him will be shot.
She also knows that if Willard looses they will throw Paul Ryan overboard like the GOP-E did her and say "Conservatives are a drain on the ticket" and again she/we would all look like fools if we had been unquestionably supporting Romney.
Sarah's good American instincts serve her well and she knows the Party Machine when she sees it.
Go Sarah!