James Joyner links to a a story about the competitiveness of House races, and states:
CQ titles the piece “Nearly Three Dozen GOP House Winners Dodged Obama’s Coattails,” as if to signal that this is an extraordinary number of seats potentially up for grabs. Another way of looking at it, though, is that 401 of the 435, or 92.2 percent, of the districts voted along party lines. That’s an extraordinary number of seats where the party primary is synonymous with the election.
Making it worse, some of the mismatches are one-off flukes, such as the Louisiana 2nd where William “The Freezer” Jefferson was narrowly defeated in a multi-candidate race run under arcane rules and which are likely to return to form in the next election.
Put more bluntly, this is why there are so many seemingly crazy people in Congress.