When former President Donald Trump takes the stage in Nebraska Friday night—he’s scheduled to hold one of his well-known rallies for GOP statehouse hopeful Charles Herbster—Republicans won’t be the only ones watching. Democrats tell us they’ll be live tweeting and fact-checking stump speeches from the I-80 Speedway in Greenwood. According to Nebraska Democratic Party Chair Jane Kleeb, “Herbster and Trump embody today’s Republican Party— liars, sexual predators, spreader of conspiracy theories and tax dodgers.” Herbster—who has banked much of his campaign, arguably all of it, on Trump’s endorsement—was recently accused of groping eight women, including the only named accuser, GOP...