How Much Does Your Congressperson Support Their Party/Support Bush?

Go to CQ.com and check out the data. They've compiled Party Unity scores (the amount a congressperson votes with his or her party) as well as Presidential Support scores (the amount a congressperson supports the president).

Analysis
Not surprising is that Congress is fairly partisan. There are relatively few moderates. For years, political scientists have worried about the declining sense of bipartisanship in Congress. This data perfectly illustrates the point.

Much of the problem lies in redistricting. What often happens is that candidates run to either the left or the right in the primary knowing they'll win an uncompetitive election in November. Many district lines are drawn in such a way to maximize either Democratic or Republican advantage. This makes the general election in November less competitive, and thus we have a system that produces more ideologues and fewer moderates.