The Demoncraps picked their candidate by committee, before the primary. They already had their nominee, so rats were free to crossover.
Ah, I see.
Well, it wouldn't be fun stomping on just the Greens and the Libertarians... So Brat can beat the Democrat, too!
Brat is an attractive politician. As a novice, you always have to be wary that he might step in it, but he speaks well and has popular positions. I think he will do just fine in November.