Key US Senate results: Democrats wrest North and South Carolina from the Republicans

Democrats need a net gain of four seats to win control of the Senate in the US midterm elections Tuesday. Initial results show the party holding onto Georgia and New Hampshire even as they win surprise victories in North and South Carolina.

Democrats need a net gain of four seats to win control of the Senate in the US midterm elections Tuesday. Initial results show the party holding onto Georgia and New Hampshire even as they win surprise victories in North and South Carolina.