Arizona Republicans selected second-term Rep. Martha McSally on Tuesday as their nominee for the open U.S. Senate seat being vacated by Jeff Flake.
The passing of John McCain leaves the state's other U.S. Senate seat suddenly open as well, creating an unprecedented circumstance and a weighty decision for the Grand Canyon State's GOP governor, who also faces voters in a volatile midterm year.
It means in the span of the next several months, Arizona will usher in two freshman senators – a scenario that hasn't occurred since the state was admitted to the union in 1912.
One will be its first female – either McSally or Democrat Kyrsten Sinema, a third-term congresswoman who also clinched her party's nomination on Tuesday night – elected by voters in November in what's expected to be one of the most competitive contests on the map. (The most recent pair of polls have shown Sinema with a 4 point lead.)
The other will be appointed by Gov. Doug Ducey in the coming weeks.
Ducey's decision, which won't come until after McCain's burial and the Labor Day holiday, could potentially impact the battleground Senate race as well as his own re-election. But only if it proves hapless or controversial.