Federal agents later dispersed the crowd using tear gas, flash bangs and less-lethal munitions.
"In Portland, they've done a fantastic job," President Donald Trump said of federal law enforcement officers.
Government officials in Oregon called for federal troops to leave Portland last week amid reports that unidentified agents were detaining protesters.
The proposed legislation would require all federal law enforcement officers to wear visible identification markers while on duty.
A new political advertisement targeted federal agents' response to protestors during demonstrations in Portland, Oregon.
Bev Barnum called for other moms to join her to protect protesters in Portland after seeing reports federal authorities were driving around in unmarked vans detaining people.
Christopher David, 53, a former Navy civil engineering corps officer, was seen suffering numerous baton blows from a federal agent in a viral video filmed during the protests in Portland, Oregon.
White House Chief of Staff suggested something could be "rolled out this week."
"The Administration's insistence on deploying these forces ... [has] little to do with public safety, but more to do with political gamesmanship," the chairpersons stated.
House Speaker Nancy Pelosi reminded President Donald Trump late Saturday that the United States is "not a banana republic," and she refused to let protesters in Portland be used as "props" in his political games.
The Portland Police Association building was set on fire on the 52nd night of demonstrations in the city, touched off by the death of George Floyd in May.
Top Oregon lawmakers warned President Trump that federal troops should leave Portland amid reports that unidentified officers were arresting protesters who were nowhere near federal buildings.
President Donald Trump and his allies spent the week highlighting his support for law enforcement—attempting to draw a contrast with Democratic rival Joe Biden in a race that's been drastically altered by the coronavirus pandemic.
"Trump and Chad Wolf are weaponizing the DHS... because they think it plays well with right-wing media," said Sen. Ron Wyden.
"We're not going to abdicate our mission," said DHS Acting Secretary Chad Wolf.
Portland Police declared a riot was taking place earlier this week during another night in unrest in the city.
A video posted on Twitter showed officers knocking a person off a bicycle before detaining the person on the ground.
Two federal officers in tactical gear were filmed detaining a protester without identifying themselves or giving a reason for the arrest in a video posted on social media.
Police made several arrests as large crowds refused to disperse during more police brutality protests in the city.
Footage of the aftermath of last night's protests shows derogatory graffiti painted on the walls of the Portland Police Bureau's North Precinct.
Portland Police Chief Chuck Lovell estimated additional costs to the bureau exceeded $6.2 million, as demonstrators continue to hold daily rallies in the weeks after George Floyd's death.
The statue was spray-painted with the words "genocidal colonist," according to images shared on social media.
When officers could not leave the building, the police bureau took to Twitter to plead with the protesters to let the officers out.
The decision to allow officers to cover their names came after they were reportedly doxxed and had personal information shared online.
Portland Police said five arrests had been made while the incident was still ongoing early Saturday morning.
A shipment of 100 fraudulent COVID-19 test kits sent from China has been intercepted by officials in Oregon.
School bus stops are "sensitive locations" that ICE agents are meant to avoid conducting arrests at.
"Mother nature is unforgiving," the Oregon Coast Guard division wrote on Facebook. "Beaches along the Pacific Northwest are rugged and remote. Always know the current ocean conditions."
The boy's mother says she's struggling to put food on the table as she has taken so much time off work to be by his side.
Kansas City voted unanimously to get rid of bus fares Thursday, making it the first major U.S. city adopt entirely fare-free public transportation.