Until recently , Brown was underfunded and unknown statewide . Democrat Martha Coakley concedes to Republican Scott Brown . President Obama `` frustrated '' by Massachusetts Senate race , aide says . Score: 6 Democrats would lose filibuster-proof majority in Senate with Brown win .
Democrat Martha Coakley concedes to Republican Scott Brown . President Obama `` frustrated '' by Massachusetts Senate race , aide says . Score: 6 Democrats would lose filibuster-proof majority in Senate with Brown win .