"Broderism," named after Washington Post columnist David Broder, is a word invented by left-wing bloggers to express contempt for bipartisanship and political centrism among elected officials. A quick Google search for "Broderism" turns up lots of left-wing blogs and websites, but no right-wing ones and few moderate ones. Basically, if someone uses the word "Broderism," you can expect that they hate Senator Joe Lieberman.
Variants: "Broderism," "High Broderism," and "Higher Broderism."