Rahm Emanuel missed his calling in life. Rather than heading the Dem's congressional campaign committee, he should have become a professional in the sport of freediving - holding your breath and diving without any breathing apparatus. Judging by his performance on this today's Good Morning America, there's no doubt Rahm would have been a world champion.In the closely-controlled world of the first half-hour [really 22 minutes] of the morning news shows, hosts keep a notoriously tight rein on their guests. Even notorious gabbers like Joe Biden are lucky to get in 15 seconds in before being cut short. Katie Couric,...