Matheson was not scared out of the race..he is looking at the Senate. Remember he was reelected last time in the state giving Romney the highest margin of victory.
He looks at Hilary running in 2016 and sees an excellent chance of being the next senator.
This was not good news for Conservatives, a RINO will take Mathesons seat and a Dim will get Lee's seat in 2016...
How does quitting, giving up a seat to the GOP, and sitting on the sidelines for four years help Matheson? I actually live in this district - Mia seems like a fine candidate. Mike Lee is an excellent speaker and is earning kudos for standing up to Oamacare - he will be ok in 2016.
If we have to be concerned about losing a Senate seat in Utah to a Democrat, then we are done.