Sitting and ex-Tennessee U.S. Representatives have been victorious in eight of 22 U.S. Senate bids over the last century.
Only one region of the country is regularly seeing both parties win U.S. Senate seats in the vast majority of its states.
Bredesen could become the first sitting or ex-Democratic governor from Tennessee – and just the second from either major party – to win a U.S. Senate seat in the direct election era.
Record partisan winning streaks in races for governor can be extended, broken, or tied in 15 states holding elections in 2018.
Only one statehood governor in U.S. history has subsequently served in the U.S. Senate from another state.
GOP U.S. Senators who faced bona fide renomination battles over the last four cycles averaged 74 years of age, were 28 years older than their opponent, and had served 24+ years in the chamber; not so in 2018.
An average of seven senators have retired from the chamber each cycle during the past quarter-century; no incumbent up for reelection next year has yet closed the door on a 2018 bid.
For the first time in party history, Democrats have lost multiple states by increasingly larger margins in five consecutive presidential elections.
GOP U.S. Senators continue to win renomination, but many state party records are falling each cycle for the worst ever showings by a Republican incumbent.
The embattled Tennessee U.S. Representative narrowly escaped a primary loss in 2014 to avoid becoming just the second GOP incumbent from the state in 60+ years to lose a renomination bid.