If you live on a college campus like I do, you might think the biggest threats to free speech are liberal protesters or left-wing professors who crack down on conservative thought. But a new study from the Cato Institute rubbishes the notion that First Amendment heresy is exclusive to any party.

The results make it clear that the ongoing assault on free speech is a bipartisan effort. Yet what both parties forget is that in a democratic society, any effort to constrain the free expression of your political opponents will come back to bite you.