These five races will determine the Senate majority

The battle for the Senate is anyone’s ballgame with only a week to go until voters head to the polls.

Republicans, needing to net only one seat, are knocking on the door as the national environment moves increasingly in their direction and some surveys show them in the lead in both Georgia and Nevada. According to FiveThirtyEight’s latest projections, the fight for the majority is a “dead heat,” turning the final days into an all-out sprint to get voters out to the polls. 

Here are five races that will determine the Senate majority.

Arizona

Of the five states on this list, Democrats still have the best chance of holding Sen. Mark Kelly’s seat, though Republican Blake Masters has closed the gap in recent weeks.