Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonBiden must wait weekend for State Department pick Texas Supreme Court rejects Alex Jones request to toss lawsuits from Sandy Hook parents Paris Agreement: Biden's chance to restore international standing MORE called for a stop to violence at Donald TrumpDonald TrumpNYT: Rep. Perry played role in alleged Trump plan to oust acting AG Arizona GOP censures top state Republicans McCain, Flake and Ducey Biden and UK prime minister discuss NATO, multilateralism during call MORE's campaign rallies in an interview that aired Sunday, blaming the presumptive Republican presidential nominee for setting a "very bad example." 

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"This has to end. He set a very bad example. He created an environment in which it seems to be acceptable for someone running for president to be inciting violence, to be encouraging his supporters," Clinton said on CNN's "State of the Union." 

"Now we're seeing people who are against [Trump] responding in kind. It should all stop. It's unacceptable." 

A recent Trump rally in San Jose, Calif., was marred with violence by anti-Trump demonstrators. 

Nearly 400 protesters gathered outside the Trump event. Four people were arrested, including one for assault with a deadly weapon, according to ABC News.