Dear Mitt: In this year's contest for the Republican nomination, you have demonstrated your ruthlessness. Your attacks on fellow Republicans have show that you are willing to be as brutal, vile, and remorseless as is necessary to defeat your opponent. Presumably, this is how you made $200 million in about 12 years at Bain. In 2008 and now in 2012 you have left a field of wounded warriors in your wake: Huckabee, Giulianni and now Newt. We can see you are willing to be as dirty and nasty as you need to be to win. But the question remains, will...