West Virginia Governor Jim Justice is expected to announce his campaign for the U.S. Senate on Thursday, challenging incumbent Senator Joe Manchin in a race that could determine the majority in the upper chamber. Manchin has responded with a statement emphasizing his focus on lowering healthcare costs and protecting Social Security and Medicare. Justice and Manchin will battle for the seat in a heated race, with Justice's support for Trump and Manchin's moderate stance sure to make it an interesting one.