Biblical reason if she decided to run for president:
Matthew 6:24 (New International Version)
24”No one can serve two masters. Either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve both God and Money.
Everyone on Hardball/MSNBC thinks this move is a disaster for Sarah Palin.
This must mean this was a masterful move.