The violence comes a month after mask-wearing protesters at the University of California, Berkeley, shut down a planned speech by a provocative far-right commentator by lighting fires and smashing windows.
On Saturday, smaller skirmishes broke out in other parts of the country.
In Minnesota, 400 Trump supporters packed the state capitol rotunda in St. Paul and were met by a smaller group of counter-demonstrators, according to the Star Tribune. Scuffles erupted and six counter-protesters were arrested, the newspaper reported.
In Nashville, Tennessee, Trump supporters and counter-protesters cursed at each other and occasionally made physical contact, but state troopers broke up the fighting, according to the city’s public radio station.
Most rallies appeared to take place without any disruption or violence, like one outside the Michigan State Capitol in Lansing.
“How can anyone be disappointed with bringing back jobs? And he promised he would secure our borders, and that’s exactly what he’s doing,” said Meshawn Maddock, one of the organizers of the rally which drew about 200 people.
Brandon Blanchard, 24, among a small group of anti-Trump protesters, said he had come in support of immigrants, Muslims and transgender people, groups that have been negatively targeted by Trump’s rhetoric and policies.
“I feel that every American that voted for Trump has been deceived,” Blanchard said.
More than 200 supporters of the president rallied in downtown San Diego.
“After this, I think people will take the hint,” said former U.S. Marine David Moore, 42, a participant in the rally. “It’s okay to voice support for the president and the country.”
In Palm Beach, Florida, where Trump is staying this weekend at his Mar-a-Lago resort, the president’s motorcade stopped and Trump stepped outside his car to wave at a crowd of dozens of supporters. A smaller group of protesters stood across the street.
In New York, about 200 people demonstrated their support for the president in front of Trump Tower in midtown Manhattan. In Washington, about 150 people marched from the Washington Monument to Lafayette Square in front of the White House to show their support for the president.
(Additional reporting by Ned Randolph in San Diego, Melissa Fares in Palm Beach, Florida, and Jonathan Allen in New York; Writing and additional reporting by Alex Dobuzinskis; Editing by Dan Grebler and Mary Milliken)