The Rothenberg Report, one of the leading political handicappers for Congressional races, has just declared that the Massachusetts Senate race has tilted toward Republican Scott Brown:

While special elections often come down to turnout – and they therefore are more difficult to predict than normal elections – the combination of public and private survey research and anecdotal information now strongly suggests that Republican Scott Brown will defeat Democrat Martha Coakley in tomorrow’s race to fill the remainder of the late-Sen. Edward Kennedy’s seat.

Brown is running extremely well with Independents in the Bay State, and unless Democratic turnout exceeds everyone’s expectations, Brown is headed for a comfortable win. Move from Toss-Up to Lean Takeover.

The news follows the Cook Political Report’s call over the weekend that the balance was slightly in Brown’s favor:

“Given the vagaries of voter turnout, particularly in lower participation level special elections, this race could still go either way, but we put a finger on the scale for Brown. Last minute Democratic attacks on Brown have driven his negatives up some and slightly diminished the incredible intensity of support that Brown enjoyed, but it looks more likely than not to hold.”