Hillary Clinton

Democratic presidential candidates Hillary Clinton participates in the CNN TV One Ohio Democratic Presidential Town Hall in Columbus, Ohio, Sunday, March 13, 2016.

(AP Photo/Carolyn Kaster)

COLUMBUS, OHIO - Democratic presidential candidates Hillary Clinton and Bernie Sanders participated in a town hall event in Columbus, Ohio, Sunday night. The event was televised on CNN.

The town hall followed a joint appearance at a dinner hosted by the Ohio Democrats. Each candidate also campaigned individually in Ohio, which holds its primary election on Tuesday.

Clinton said she's received private messages from foreign leaders asking to endorse her candidacy in hopes of defeating Republican front-runner Donald Trump, who Clinton said is encouraging violence and chaos to win over voters.

Clinton refused to name the dignitaries, though she says she told them that the election must be decided by Americans. But, she says, her experience as secretary of state will offer a powerful contrast with Trump, should they face off in the general election.

"At our best, Americans have rejected demagogues and fear-mongers," she said.

"I believe that I will have an opportunity to really focus in on how dangerous a Donald Trump presidency would be for our standing, for our safety and for the peace of the world," she added

She also said she supports a "very limited use" of the death penalty in cases where there are "horrific mass killings."

Clinton said the states have "proven themselves incapable of carrying out fair trials that give any defendant all the rights that defendant should have." She added that she would "breathe a sigh of relief if either the Supreme Court or the states themselves began to eliminate the death penalty."

But Clinton added that she thinks the death penalty should still be kept "in reserve" for limited cases in the federal judicial system, citing the Oklahoma City bombing and the 9/11 attacks as examples.

"But what happened to you was a travesty," Clinton said. "I know that all of us are so regretful that you or any person has to go through what you did."

Sanders called on Donald Trump to "tell his supporters that violence in the political process in America is not acceptable."

The Vermont senator was asked about the Republican front-runner's statements that the Sanders campaign sent protesters to disrupted Trump's rally in Chicago.

Sanders called Trump a "pathological liar" and said his campaign has never encouraged "anybody to disrupt anything." He added he hopes "Mr. Trump tones it down big-time and tells his supporters violence is not acceptable in the political process."