Violence at Trump Rallies Mirrors Strife of Days Past

On Friday, GOP frontrunner Donald Trump cancelled a rally in Chicago after clashes erupted between protesters and Trump supporters.

Disorderly outbursts spilled into the streets and several people were arrested. Though these confrontations now seem to be commonplace at Trump events, for some, the escalating scale and severity of these recent demonstrations are beginning to echo other violent eras in American politics, where issues of class, race, and inequality charged the debate then as they do now.

Heather Cox Richardson, a historian at Boston College predicted this behavior and uses history to provide perspective.