Obama got ticked this week over an article in a rock-n-roll magazine and summoned his imperial general from halfway around the world to give him a well-publicized dressing down preparatory to accepting his much-anticipated resignation. General McChrystal might have suspected that El Supremo was looking for some *ss to kick, having publicly gone on record the other day as needing an *ss-kicking, preferably someone else’s for a change. And since McChrystal’s was widely regarded as the baddest *ss around, he was a marked man even before the rock-n-roll mag went to press.