These Are Some of the Biggest US Senate Races to Watch in the 2020 Election

The current balance in the US Senate is 53 Republicans and 47 Democrats (including two Independents who vote with the Democrats). In 2020, 35 seats are being contested, including two special elections for appointees replacing two senators felled by illness: Georgia Sen. Johnny Isakson and Arizona Sen. John McCain.

Democrats need three or four seats to wrest Senate control from Republicans. If Biden wins the presidency, they need three seats; if Trump is re-elected, they need four. The GOP faces daunting odds since they must defend 23 seats, almost double the seats defended by Democrats.