Some new polling for Daily Kos by Tom Jensen shows that about half of Republican voters think President Obama should be impeached. He pairs this up with polling that finds about half of Republicans think Obama wasn't born in the U.S. The publication comments:
Says Tom, "The lunatic fringe of the GOP is basically half of the party’s voters" - in which case, it's really not a "fringe," is it?
I'd put the percentage higher among the Arkansas Republican legislative delegation, if their bill output is any measure.