COLUMBIA, South Carolina — American voters on Tuesday elected South Carolina's first woman governor.Tea-party backed Republican state Rep. Nikki Haley will also become the nation's second Indian-American governor when she replaces term-limited Gov. Mark Sanford. Louisiana's Bobby Jindal also is Indian-American.She is the first American raised as a Sikh to hold the office of governor.Haley won over state Sen. Vincent Sheheen in a contest that flipped between the candidates by the minute Tuesday night.Haley is a three-term House member who campaigned as a political outsider and earned the backing of Sarah Palin.