Former Sen. Bob Kerrey of Nebraska reportedly is rethinking his decision not to run for the seat Sen. Ben Nelson is vacating. He has not been on a ballot in his state since 1994. (Associated Press)

Former Sen. Bob Kerrey of Nebraska reportedly is rethinking his decision not to run for the seat Sen. Ben Nelson is vacating. He has not been on a ballot in his state since 1994. (Associated Press)