"To be honest with you, I've read and I've re-read it, and I asked Ed Markey, 'What in the heck is this?" Durbin said to giggles from the "Morning Joe" set. "He says it is an aspiration. It's a resolution aspiration. What we're going to do is ask the Republican leader, 'What's your position on global warming?' while we're on the record. Shouldn't you come out and tell us whether you believe manmade, human activity is having an impact on our environment?"