Scott Brown says he's a different kind of Republican, a centrist willing to work with Senate Democrats to fix health care and the ailing economy. But his independent bent is likely to be sorely tested in a bitterly divided Senate where party loyalty is often at a premium. "If he wants to have a future in Massachusetts politics, Brown has to live up to being a New England Republican - fiscally conservative, socially moderate, independent-minded," said Dante Scala, a University of New Hampshire political science professor. "Is Obama going to try to craft some room for himself in the center?"...