Democrat Scott Colom won a stunning upset in ​Mississippi's ​US Senate race ​on Wednesday after days of ⁠counting, US media projected, defeating Republican incumbent Cindy ⁠Hyde-Smith to become the southern ​state's first black senator since the reconstruction era that followed the Civil ⁠War. It was one of the final outstanding races to be called since the November 3 elections, in which Democrats overwhelmed Republicans to win control of both chambers ⁠of the US Congress.