Sure, but I got death threats 10 and 15 years ago, too. That’s not new. What’s new is the feeling — present on both sides — that things are spiraling out of control.

Researchers see a departure from a pattern that held for nearly 50 years. “This era of violent populism will get worse before ...

Political violence has rocked the U.S. multiple times in recent months, culminating with the killing of conservative activist ...