CBS News has projected Colorado’s John Hickenlooper won the race against incumbent Republican Senator Cory Gardner, the first pick-up for Democrats. Democrats will need to pick up four seats after CBS News has projected Alabama incumbent Senator Doug Jones has been defeated by Republican Tommy Tuberville.
The Arizona Senate race is leaning Democratic, CBS News estimates. Other close races in Maine, Georgia, North Carolina and South Carolina are considered toss ups, CBS News estimates.
Republicans hold a slim 53-47 majority in the Senate. Democrats will likely need to turn four GOP-held seats, since Alabama, held by vulnerable Democratic Senator Doug Jones, is leaning Republican, CBS News estimates.
Republicans have to defend 23 seats in the Senate, as opposed to just 13 Democratic-held seats. The 2016 presidential election was the first presidential election in modern history where all of the states’ Senate races went towards the same party as the presidential winner in that state.
Democrats are also hoping to increase their majority in the House and add to their current 35-seat advantage.