A group of white nationalists plan to head to the Republican National Convention in Cleveland next month to defend Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE supporters, McClatchy reports.

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"We're essentially just going to show up and make sure that the Donald Trump supporters are defended from the leftist thugs," said Matt Parrott, a spokesman for the Traditionalist Worker Party.

Parrott said about 30 members would attend the convention. The white nationalist group had planned a rally last weekend in Sacramento, Calif., where several people were stabbed in clashes with counter-protesters.

Parrott predicted there would be a "couple of isolated skirmishes."

“You’re going to have a relatively civil event where you’re going to have the leftists protesting Trump and you’re going to have us arguing up against the leftists,” he said. “And you’re going to have the police there ensuring that you’re going to have a first world situation and not some sort of ‘Gangs of New York’ knife fight.”

The brawl in Sacramento began as the group, along with the Golden State Skinheads, was setting up for a march on the California state Capitol grounds to protest aggression toward Trump supporters, according to McClatchy.

But brawls quickly erupted between several dozen white nationalists and hundreds of protestors that left at least 10 people injured.

Trump, who will likely receive the Republican nomination for president at the convention, has faced controversy over white nationalists publicly supporting him.

David Duke, a former Ku Klux Klan leader, has called Trump the "white knight" for "European Americans."

"Even though Trump is not explicitly talking about European Americans, he's implicitly talking about the importance of European Americans," Duke said in May on his radio broadcast.

In May, it was also reported that William Johnson, the head of white nationalist organization American Freedom Party, was mistakenly chosen for a delegate position.

Hope Hicks, a spokeswoman for the Trump campaign, said Williams was included as a potential delegate due to a "database error."