[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/08/11/art.bennet.buck.2shot.cf1.gi.jpg caption ="In Colorado, Republican Ken Buck is challenging incumbent Sen. Michael Bennet."] FROM CNN's Jack Cafferty: After months of taking a beating, the Democratic party finally got some much-needed good news in yesterday's primaries. The biggest victory came in Colorado, where Michael Bennet, the candidate backed by President Obama and the party … Continue reading Is this year's anti-incumbent fever for real?