Has the GOP primary gone off the rails before the first vote has even been cast?

In 2008, Sen. John McCain rejected the endorsementof John Hagee, a far-right pastor who had called the Catholic Church the "Great Whore" and said thatHitler was sent by God to be a "hunter" of Jews who had not yet moved to the land that would become Israel. McCain wasn't exactly running as a moderate - look who he chose to be his vice president - but he knew, at least this time, that a line had been crossed.

Today's GOP presidential candidates seem to have no such scruples.