The exact quote from Gov. Palin was, "And if there is an open door in '12 or four years later, and if it is something that is going to be good for my family, for my state, for my nation, an opportunity for me, then I'll plow through that door." She made the comment in an interview with Greta Van Susteren November 10, 2008.
But Scott Conroy paraphrased it well enough in this appearance he made with Shushannah Walshe on The O'Reilly Factor nearly a year later:
h/t: Free Republic