General, If I'm going down on this I'm taking you with me.

Obama relieves Gen. Stanley McChrystal from duties as commander of U.S. and NATO troops and names Gen. David Petraeus as replacement

Advice from General Petraeus along with that of General McChrystal helped to put President Obama on the ambitious nation building course in Afghanistan against the advice of others led by Vice President Biden. Now that Obama's choice looks increasingly like a blunder that puts him in the hot seat he perhaps draws satisfaction from making sure that Petraeus will be in a hot seat of his own. I wouldn't be surprised if the selection of Petraeus was a suggestion from VP Biden.