A majority of the 17 seven-term U.S. Senators in history have either retired, resigned, or died in office, but five of the six who ran for reelection were victorious.
At least one first-term incumbent has been defeated in 48 of the 52 election cycles during the direct election era.
The partisan gap between the number of seats Democrats and Republicans will defend in 2018’s U.S. Senate and gubernatorial races is at its largest in more than half a century.
The Alabama duo served alongside one another for the 27th longest stretch in the chamber’s history.
Only 2 of the 43 men and women to serve in Congress from Wyoming have subsequently been elected governor; none have even landed on the primary ballot in more than 65 years.
Joe Manchin is attempting to win the 21st consecutive U.S. Senate reelection bid by a Mountain State Democrat.
Each of the three congresses have convened during the last 20 years.
Heller is the only Republican among the 15 U.S. Senators who serve states in which their party holds a minority of U.S. House seats; a dozen (including Heller) are up for reelection in 2018.
Up to 11 women could run for reelection to the chamber in two years; the chamber’s all-time record is just six.
The New Hampshire duo becomes the seventh set of ex-governors from the same state to simultaneously serve in the U.S. Senate in the 21st Century.