Brown Leads Warren By 4 Point http://www.wbur.org/2012/10/09/brown-leads-warren-poll BOSTON â A new WBUR poll (PDFs â topline, crosstabs) finds a turn in the U.S. Senate race. Republican incumbent U.S. Sen. Scott Brown now leads his Democratic challenger, Elizabeth Warren, 47 to 43 percent. The survey of likely voters, conducted Oct. 5-7, has a 4.4 percent margin of error. He better win because this Elizabeth Warren is really a bad person and I don't like seeing bad people succeed.