Days after promoting antisemitism, Elon Musk has moved to another vile conspiracy theory.

Tales of mysterious-sounding livestock deaths were widespread a few decades ago. Why have they suddenly reappeared—and why do they fascinate us?

The conspiracy theories are running rampant.

Matthew Dallek’s “Birchers” traces how conspiracy theories went from being a fringe pastime to the right’s defining feature.

A new lawsuit reveals text messages between Fox News staffers that show they didn’t believe Trump’s conspiracies, even as they pushed them to their viewers.

Make no mistake, America’s experiment in popular sovereignty is in jeopardy. Here’s how this moment compares to past crises.

As his approval ratings sink, the former president is growing more and more unhinged—and more willing to indulge his most dangerous followers.

What the Georgia congresswoman’s appearance at two conferences—one conservative, one far right—says about the state of the GOP.

The vigilantes running wildfire checkpoints in Oregon are the latest right-wing militants to take advantage of a crisis.

How a right-wing conspiracy blossomed in the pre-internet age

Thursday's "summit" shows the increasingly paranoid president is desperate for allies who back him unequivocally.