In 2015, Democratic gubernatorial nominees in each of these states received the lowest support recorded by their party in more than 140 years.
Each of the last three Kentucky governors seeking another term did so with a new running mate.
Democrats have won just four of 135 elections to statewide office in the Deep South since Barack Obama became president.
In the direct election era, parties in the midst of nine-election winning streaks have gone on to win a 10th consecutive contest in 42 of 47 attempts.
Only one region of the country is regularly seeing both parties win U.S. Senate seats in the vast majority of its states.
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.
The 32.7 percent won by Hillary Clinton is the second lowest level of support by a Democratic presidential nominee in the state since 1828.
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.
It has been 30 cycles since the last time multiple former Senators returned to their old job in the same cycle.
Only five out of nearly 200 U.S. Senate vacancies since 1913 were caused by a voluntary resignation that resulted in a change in partisan control of the seat.