FWIW, Real Clear Politics (which boasts an average of poll numbers over the course of the last few released polls) currently show Murphy with a 4% lead over McMahon in the Connecticut Senate race. RCP also has changed the status of the race from "Leans Democratic" to "Toss Up". A poll released a couple of weeks ago by Mason-Dixon (generally one of the least-known but most-respected polls by political professionals) had the race as a tie. But that was a couple of weeks ago. Rasmussen's latest shows Murphy with a 6-point lead.
In a lot of States, I would suggest that the late surge by Governor Romney in the Presidential race will help down-ballot Republicans in their races. But, in Connecticut, the presidential race is basically decided with the latest Presidential poll in Connecticut (a Quinnipiac poll released a week ago) showing President Obama with a 14-point lead in the State.
There was (and remains) hope for the McMahon campaign. A lot will have to do with voter turnout and which voters turn out. If Governor Romney keeps the race in Connecticut close (say under a 10-point margin) would put McMahon in a place where she's got a shot to win. If President Obama wins Connecticut by more than 10 points, chances are McMahon is toast and Murphy gets elected to the Senate.
wk