Jim Thomson and Jesse Sussell have done an interesting new study on Congress's increasing polarization.

I'm lucky enough to be able to claim Jim as a colleague here at UNLV--and he's marvelous.  Check out his bio, which only scratches the surface of why he's so cool.

You can read the summary here, and here's the paper (Are Changing Constituencies Driving Rising Polarization in the U.S. House of Representatives?).