Portland Police Bureau
Police are preparing for possible clashes as thousands are expected to attend the Proud Boys-sponsored event.
Officers allowed street brawls between "willing participants" last weekend, despite escalating violence from Proud Boys and other far-right groups.
Demonstrations have happened in Oregon’s largest city nightly for two months since George Floyd was killed in Minneapolis in May.
Authorities estimate there were 3,000 present at the peak of the protest.
Earlier in the night, Ted Wheeler was mostly jeered as he tried to rally demonstrators who have clashed nightly with federal agents.
House Democrats are seeking an investigation into the Trump administration's use of force against anti-racism demonstrators.
"Look at Trump's Twitter ... he's watching antifa. That's all we wanted," boasts former Infowars staffer and protest organizer Joe Biggs.
Police arrested at least 13 people at the Saturday rally.
Police say some "milkshakes" hurled in skirmishes included quick-drying cement.
Jermaine Massey, who filmed parts of the ordeal, says he was a victim of racial profiling in Oregon.