No appointed US Senator has ever won a primary runoff and only two incumbents who placed second in the initial primary have done so.
Just seven states have had an average victory margin of less than 10 points over the last three decades with North Carolina leading the pack.
History suggests the nation is overdue for a record-setting U.S. Senate nail-biter and there are plenty of states that could serve up extremely close contests on November 8th.
Republicans would break a party record if eight U.S. Senate nominees are elected from states voting Democratic for president.
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.
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.
Since 1972, 12 of the 27 Republican U.S. Senators to lose during presidential election cycles did so while the GOP White House nominee carried their state.
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).
Ellmers’ loss ends a string of 299 renomination victories by members of both parties in the state since 1958 and 120 in a row by Republicans since 1902.
Kentucky became the sixth state where O’Malley has eclipsed one percent of the primary vote – all located in the South.