Mississippians haven’t elected a Democrat to the Senate in nearly four decades, but powerful backers of the Magnolia State’s underdog candidate believe that by dumping money into the race they can overcome the hump.Scott Colom, a district attorney, is squaring off against incumbent Sen. Cindy Hyde-Smith, R‑Miss., in deep-red Mississippi, and some of his top backers, including billionaire philanthropist George Soros’ top advisor, believe that he is primed to flip the seat.During a call earlier this month with Sen. Elizabeth Warren, D‑Mass., former Rep. Joe Kennedy, D‑Mass., and Soros’ top advisor, Michael Vachon, Colom’s backers laid out his path forward.MISSISSIPPI’S GOP GOVERNOR DROPS ELECTION PLEDGE IN HUGE SETBACK FOR TRUMP’S MIDTERM PLAN“Scott ca …