It couldn't be because Sarah is a good person with nothing to hide, could it? Nah.
I gotta say though, that Karl Rove is a busy fella. First he uses his weather machine to hit the gulf with Ike, and drive the price of gas back up (to bring the drilling issue back to the fore). Now he's hacking Sarah's email, no doubt planting false evidence to lead investigators back to some Obamaniac. Now, if I could just figure out why he arranged for all these companies to go bankrupt. He must have some angle there.
Becasue they wre giving money to Dimmycraps?