Jaime Harrison, the former chairman of the South Carolina Democratic Party, has announced a campaign to challenge Sen. Lindsey Graham (R-S.C.) in 2020, using his launch video to accuse Graham of "comical" hypocrisy for going from an ardent critic of President Trump in 2016 to one of his staunchest allies.
These Senate seats are up for election in 2020
There are 34 Senate seats up for election in 2020 — including a special election in Arizona — many of which are expected to be brutally competitive as Democrats vie for control of the Senate.
Quick take: The U.S. Senate is currently made up of 53 Republicans, 45 Democrats and 2 independents who caucus with the Democrats. Dems must win 3 or 4 seats to take control of the Senate — 4 to recapture control — or 3, if they also win the vice presidency.