Here is the 112th Congress Caucus Map:
Key:
Dem 90% - Progressive Caucus
Dem 70% - Progressive Caucus & New Democrat Coalition
Dem 50% - New Democrat Coalition
Dem 30% - New Democrat Coalition & Blue Dog Coalition
Dem 10% - Blue Dog Coalition
Dem 00% - Progressive Caucus & New Democrat Coalition & Blue Dog Coalition
Grey - No Caucus Membership
Rep 90% - Tea Party Caucus
Rep 70% - Tea Party Caucus & Republican Study Committee
Rep 50% - Republican Study Committee
Rep 30% - Republican Study Committee & Main Street Republican Partnership
Rep 10% - Main Street Republican Partnership
Rep 00% - Tea Party Caucus & Republican Study Committee & Main Street Republican Partnership (Also one case of Tea Party Caucus & Main Street Republican Partnership, symbolized with a dot)
I thought Dave Camp was a member of both the Study Committee and the Main Street Partnership. And this is the old congressional district before redistricting.