[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/07/23/art.unity.gi.jpg caption=] FROM CNN's Jack Cafferty: PUMA is an acronym that stands for "Party Unity My A–." It's the rallying cry for a group of disenchanted Democrats – "PUMAs." Many are supporters of Hillary Clinton who just can't quite get over the fact that she lost and Barack Obama won. A humorless group, … Continue reading Why do some Clinton supporters want to derail Obama?