The 2020 United States Senate elections will be held on November 3, 2020, with the 33 Class 2 seats of the Senate being contested in regular elections. The winners will be elected to six-year terms extending from January 3, 2021, until January 3, 2027. Additionally, there will also be two special elections: one special election in Arizona to fill the vacancy created by the death of John McCain in 2018 and one in Georgia following the resignation of Johnny Isakson at the end of 2019.

In 2014, the last regularly scheduled elections for Class 2 Senate seats, the Republicans won a net gain of nine seats from the Democrats and gained a majority in the Senate. Republicans defended that majority in 2016 and 2018, and held 53 Senate seats following the 2018 elections. Democrats held 45 seats after the 2018 elections, while independents caucusing with the Democratic Party held two seats.

Including the special elections in Arizona and Georgia, Republicans will be defending 23 seats in 2020, while the Democratic Party will be defending 12 seats. Democrats will need to pick up four seats to gain a majority in the Senate.[a]

Poster Comment:

One safe Republican seat to be taken from Dems in Alabama. One tossup state with a Republican Senator in Arizona who was appointed to McCain's seat.

I cannot copy the chart with all the elections for Senate on one page. Click on the URL above to see it. As it stands Republicans might gain one seat.