Cook Political Report calls the race between Richard Blumenthal and Linda McMahon a “toss-up:”

“The larger point, though, is that with seven weeks left to go, McMahon has made this a race and Democrats’ best efforts to stall her candidacy have not worked. This, of course, could certainly change as they start airing negative ads against her, but for now McMahon is in the hunt, handing Democrats a race in an expensive blue state that they weren’t expecting.”

President Obama was in Connecticut today holding fundraisers on Blumenthal’s behalf:

Despite a 45 percent public approval rating in a blue state where he won 61 percent of the vote in 2008, Obama is expected to turn out about 350 supporters, some of whom shelled out $12,400 to be photographed with the president, those familiar with the event said.

The latest Rasmussen poll had Blumenthal leading McMahon 53 percent to 44 percent.