Does she personally need a political career? Unlike Romney who planned on being President in playgroup, I doubt if the thought even crossed Sarah's mind until 17 months ago.
Now that some people have suggested, and others have suggested not, that she could do the job, she's probably thinking "Challenge Accepted!"
Bit if she doesn't get it, she goes back to that lakeside cottage, does a little hunting and fishing, and watches the royalty checks on her second book come in. (It's a hard life, but I'm sure she could be happy at it)
I only have a CAR in my driveway!