Sure, he polls well, but can he debate? The polls keep looking better and better for Rick Perry, despite this week’s provocative headline in Politico, “Is Rick Perry Dumb?” Dumb or not, it sure seems to be working. On Monday, a CNN/ORC International poll of Republicans and independent voters who lean Republican found that Perry’s still on top, with 27 percent of Republicans nationwide supporting him for the nomination. Romney’s in second with 14 percent. A poll released Tuesday from Public Policy Polling showed Perry leading among likely Republican primary voters in South Carolina with 36 percent, a full 20...