From NBC's Domenico Montanaro President Obama made an appearance as a third CBS commentator at the Georgetown-Duke men's college basketball game here at the Verizon Center. The president looked like he was having fun, joked that he was coming after Clark Kellogg's job and about his appearance at the House Republican Conference on Friday. After showing the 2008 footage of Obama playing with the eventual National Champion North Carolina Tar Heels, CBS play-by-play man Verne Lundquist asked, "Mr. President, you're a left-hander, do you have any trouble going to your right?" Recognizing the double entendre in the question, Obama said...