Okay, I'm going to go way out on a limb here and make an upset prediction for the November election: the Republican candidate in Connecticut will beat Attorney General Richard Blumenthal. Everyone considers Blumenthal a lock at this point, but I've noticed in his first few media appearances that he is bland, boring, and noncommittal.
It reminds me of a similar race for governor of Oregon in 1990. There, another Harvard-educated state AG, Republican Dave Frohnmayer, was poised to be anointed governor. It was a slam dunk. Everyone loved Dave. He had massive cross-party appeal. He was smart, pragmatic, etc etc. Everyone thought election day was a mere formality, including Frohnmayer, who ran a listless, diffident campaign. On election day, he lost to a non-entity the Democrats put up as a sacrificial lamb. (I can't even remember now who it was--Barbara Franklin maybe?). I'm guessing the same dynamic may play out in Connecticut this year, especially if the bland Blumenthal runs a defensive campaign (defensive of Obama, etc), which is likely.
Footnote: The Oregon governorship came open in 1990 as a result of the surprise decision of first-term governor and political powerhouse Neil Goldschmidt not to seek a second term. We learned 15 years later that his decision was the result of a hidden scandal: he had been sleeping with his 14-year old babysitter. Stepping down kept it under wraps for more than a decade, but it finally came to light. But even this was a lesson in media bias: The Portland Oregonian newspaper had the story, but sat on it for several days out of their favoritism for Goldschmidt, and only published it when an alternative weekly got hold of the story and threatened their scoop. And even then, they referred to to Goldschmidt's acts as "an affair."