Only one of the 73 Republican U.S. House members from Trump states with Democratic US Senators on the 2018 ballot has mounted a challenge.
The 10 Trump states with Democratic incumbents have voted for senate nominees from the opposing party of the sitting president 62 percent of the time over the last 50 years.
The Republican Party’s hold on every congressional seat could increase from nine to 12 states after the 2018 cycle.
Joe Manchin is attempting to win the 21st consecutive U.S. Senate reelection bid by a Mountain State Democrat.
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.
For the first time in party history, Democrats have lost multiple states by increasingly larger margins in five consecutive presidential elections.
Meanwhile, Trump breaks a statewide 152-year old state record set by Abraham Lincoln in 1864 for the best ever showing in the state.
If a handful of toss-up races all end up in the Democratic column, the party will have its strongest showing in races for governor since its formation nearly 190 years ago.
It has been 30 cycles since the last time multiple former Senators returned to their old job in the same cycle.
After the 2016 cycle, the party could reach record winning streaks for governor in five states across three regions of the country.