COLUMBIA, S.C. (AP) — Former Vice President Joe Biden charged Saturday that Jim Crow is “sneaking back in” as he emphasized voting rights at his first presidential campaign stop in South Carolina, where black voters play a key role in the South’s first presidential primary.In criticizing Republican efforts to adopt more stringent voting rules, including identification requirements and curtailing early voting hours, Biden recalled the racial segregation laws of the past.“You’ve got Jim Crow sneaking back in,” he said, referring to the era before the civil rights movement. “You know what happens when you have an equal right to vote?...