As voters go to the polls in six states today, super PACs and other outside groups are playing an outsize role in some of the high profile contests, as incumbent members of Congress square off against other incumbents due to redistricting, special interests duke it out in one district, and Democrats try to avoid being beaten out by an indepedent for the fall ballot. Here's a rundown of some of the spending:

Sherman v. Berman

Thanks to redistricting, one of the most high profile contests pits two House Democrats against each other in California's San Fernando Valley, where ...