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.
Montana Republicans have won only 33 percent of statewide races since Hoover when their party controls the White House.
Not since before World War II have five U.S. House special elections been conducted during the first six months of a new Congress.
Democrats have won 55 percent of statewide elections in Montana over the last quarter-century, but the party’s 11-cycle losing streak for the state’s at-large U.S. House seat is its longest in history.
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.
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.
New Hampshire has both the largest (179 in a row) and longest (since 1856) streaks of fielding U.S. House nominees from both major parties; Minnesota, Idaho, and Montana also have streaks north of 100.
Midwestern states account for 40 percent of the cumulative female lieutenant gubernatorial service in U.S. history along with the three longest current streaks (Minnesota, Iowa, and Wisconsin).