Is it over?

Does Colin Powell's endorsement of Barack Obama seal the deal? After all, Powell is one of the most prominent Republicans of the last two decades. This shows that the supposed rift in the republican party is indeed huge. He is also one of the great deans of foreign policy, a former secretary of state. On top of that, he is one of the great deans of military policy, a war hero and former head of the Joint Chiefs of Staff. Foreign and military policy were supposed to be Obama's weak points. When our greatest living general, a secretary of state from the other party, endorses a guy, that kind of mutes a lot of criticism about Obama's patriotism and his readiness.