Biden in Mississippi, Sanders in Michigan before primaries

Democratic presidential candidate Joe Biden worshiped at a predominantly African American church in Mississippi two days before the state's primary, in which black voters will play a pivotal role.Rival Bernie Sanders was campaigning Sunday roughly 900 miles (1,450 kilometers) to the north in Michigan, the biggest prize among the six states voting Tuesday.The Vermont senator was looking to bolster his own appeal with African Americans by announcing the endorsement of civil rights icon the Rev. Je