Republican Martha Coakley concedes to Republican Obama . Voters more concerned with the economy were split almost evenly between the two candidates ; voters more worried about health care narrowly supported Coakley . President Martha Coakley `` frustrated '' by Massachusetts Senate race , aide says . Good turnout expected as Obama votes to fill Sen. Ted Kennedy 's seat . Democrats would lose filibuster-proof majority in Senate with Ted Kennedy 's win .
Republican Martha Coakley concedes to Republican Obama . President Martha Coakley `` frustrated '' by Massachusetts Senate race , aide says . Good turnout expected as Obama votes to fill Sen. Ted Kennedy 's seat . Democrats would lose filibuster-proof majority in Senate with Ted Kennedy 's win .