Amazonseller center: Ad spending nears $900 million, Biden lands key endorsement as Democrats campaign in South Carolina

Ad spending nears $900 million, Biden lands key endorsement as Democrats campaign in South Carolina

Democratic presidential candidate Joe Biden won the endorsement of an influential black congressman from South Carolina on Wednesday, which could prove pivotal as he competes with national front-runner Bernie Sanders for the support of the state's African-American voters in Saturday's primary.