As Jimmy Kimmel discovered, mean tweets about President Obama are comedy gold — at least when he reads them. Grouchy citizens complain about every conceivable fault, and of course almost everything that goes wrong for them is his fault. The president, a cool comic who could perform stand-up in a post-presidential career, takes all the cranky comments in stride. Then he gets to a “mic drop” moment with an old (and current) nemesis. Just click.