This is the race that had DU's Uber-Prog-Purists up in arms. The D, Mello, is pro-Life. So on one hand, you had loon Bernie scaring sane voters, and on the other the Uber-Prog-Purists were clamoring for Ds - the party and, presumably, voters - to withhold support from Mello. From what I've seen, the outcome was close. DU's Uber-Prog-Purists may have snatched defeat from the jaws of victory.
As they say to runners in trail races, "Good job!"