More Resignations for 2020 The Democratic National Committee announced September 27 that this fourth debate will take place on one day.  With 12 participants     •    Joe Biden     •    Cory Booker     •    Pete Buttigieg     •    Julián Castro     •    Tulsi Gabbard     •    Kamala Harris     •    Amy Klobuchar     •    Beto O’Rourke     •    Bernie Sanders     •    Tom Steyer     •    Elizabeth Warren     •    Andrew Yang Four Senators—three Republicans and one Democrat—and 22 Representatives—17 Republicans and five Democrats—have announced they are not running for re-election. Five Republican members of Congress—one senator and four representatives—have resigned or otherwise. In 2018, 55 members of Congress—18 Democrats and 37 Republicans—did not seek re-election. As of September 30, 1,732 candidates have filed with the Federal Elections Commission (FEC) to run for Congress in 2020, broken down as follows: 254 candidates filed with the FEC to run for the U.S. Senate. Of those, 226—121 Democrats and 105 Republicans—are from one of the two major political parties. In 2018, 527 candidates filed with the FEC to run for U.S. Senate, including 137 Democrats and 240 Republicans. 1,478 candidates have filed with the FEC to run for the U.S. House in 2020. Of those, 1,385—717 Democrats and 668 Republicans—are from one of the two major political parties. In 2018, 3,244 candidates filed with the FEC, including 1,566 Democrats and 1,155 Republicans. On November 3, 2020, 35 Senate seats and all 435 House seats are up for election. Of those Senate seats, 33 are regularly-scheduled elections, one is a special election in Arizona, and another is an expected special election in Georgia. Twelve are Democratic-held seats and 23 are Republican-held seats. In the House, where all the seats are up for election, there are currently 235 Democrats, 197 Republicans and one independent with two vacancies.