Politifact:

So if Schultz believes that McChrystal is a problem inherited from Bush, he’s wrong. Obama didn’t just appoint McChrystal to fill a vacant spot; he effectively sacked the general in charge to create a vacancy that he then proceeded to fill with McChrystal as his fix-it man. The lesson for Democrats is that not everything can be blamed on President Bush. We rate Schultz’s comment Pants on Fire!