DEARBORN HEIGHTS, Mich. - Former vice president Joe Biden seized control of the Democratic presidential contest Tuesday with three victories, including a decisive win in Michigan that struck a devastating blow to Bernie Sanders's ambitions after the senator from Vermont committed his campaign to winning the key Midwestern swing state. 

COLUMBIA, S.C. - Former vice president Joe Biden decisively won the South Carolina primary Saturday, as the first Southern primary contest reshaped the race and dealt a blow to the surging candidacy of Sen. Bernie Sanders.