Charlie Cook: "This race call is one of the toughest we've had in a long time. The modern electoral history of federal statewide races in Massachusetts argues strongly that while state Attorney General Martha Coakley, the Democratic nominee, could have a close race, at the end of the day it's unlikely that she ends up losing. After all, no Republican Senate candidate has won in the Bay State since 1972."
"But the non-quantitative arguments are quite strong. Republican Scott Brown has been the superior candidate with, by a long shot, the better campaign... To the extent Coakley may still have a tiny advantage, it appears not to meet the normal standard we have for a 'lean' rating: a competitive race but one in which one party has a clear advantage. We see no clear advantage."
Stuart Rothenberg: "Democratic desperation and other compelling evidence strongly suggest that Democrats may well lose the late Senator Edward Kennedy's Senate seat in Tuesday's special election. Because of this, we are moving our rating of the race from Narrow Advantage for the Incumbent Party to Toss-Up."