The Democrats let the cat out of the bag, and now it’s clawing them in the face. The unruly mobs they mobilized to help them win control of the House of Representatives are now setting their sights on Democratic leaders. Nearly 150 people were arrested recently outside the offices of House Minority Leader Nancy Pelosi, D-Calif., and House Minority Whip Steny Hoyer, D-Md., while holding a protest to demand radical action on climate change. It’s hard to feel too much sympathy, though, since Pelosi and her fellow Democrats have only themselves to blame for their current predicament. It was the...