She resigned because the demonicRats were making it impossible for her to govern effectively.
You are part right ...
I was thinking of Sarah's ulterior motives.
From Internet ABC News ...
But she said a major factor in the decision was the mounting legal bills she and the state have had to incur to fight ethics charges from her political adversaries. None of the accusations have been proved but, she said, the costs of fighting them have been enormous.
Sarah went on to say ...
"You know, conditions have really changed in Alaska in the political arena since Aug. 29, since I was tapped to run for VP. When that opposition research -- those researchers really bombarded Alaska -- started digging for dirt and have not let up. They're not gonna find any dirt," she said. "We keep proving that every time we win an ethics violation lawsuit, and we've won every one of them. But it has been costing our state millions of dollars. It's cost Todd and me. You know the adversaries would love to see us put on the path of personal bankruptcy so that we can't afford to run."