Kellyanne Conway on Monday called for Democrats to speak out against violence at recent protests.

During an interview with Fox News, Conway specifically pointed to Democratic National Committee Chairman Tom Perez, Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) and 2016 Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE.

"I'd love for them to come forward as leaders of the Democratic Party and tell people to stop. They have a right to express their First Amendment," she said. "But at the same time, violence is not going to get us anywhere."

Conway also said she wants to see Democratic leaders come out and negotiate on policy issues.

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"I would love to hear Democratic leaders of the party — instead of still talking about the election — move forward and help us negotiate," she said. "Help us get some Democratic votes on tax reform, on healthcare reform, infrastructure."

Thousands of people protested across the country Saturday — on what is traditionally Tax Day in the U.S. — to demand President Trump release his tax returns.

During an unrelated protest in Berkeley, Calif., more than a dozen people were arrested after violent clashes erupted in the streets between pro-Trump and anti-Trump groups.

The president on Sunday appeared to mock the rising calls for him to release his documents.

"Someone should look into who paid for the small organized rallies yesterday," he tweeted. "The election is over!"

"I did what was an almost an impossible thing to do for a Republican-easily won the Electoral College! Now Tax Returns are brought up again?" he said in another tweet.

--This report was updated on April 18 at 10:09 a.m.