Protesters in front of the Multnomah County Justice Center on July 20 in Portland, Oregon. Photo: Nathan Howard/Getty Images

Black Lives Matter protests swelled in Portland, Ore., on Monday night, CBS News reports, as demonstrations against police violence have continued in the city for more than 50 days.

The big picture: The ramp-up came hours after President Trump threatened to send federal law enforcement into other cities run by Democrats. Demonstrations against excessive use of police force sparked by the killing of George Floyd while in police custody have overall been peaceful in cities around the country.

  • "Well, I’m going to do something — that, I can tell you. Because we’re not going to let New York and Chicago and Philadelphia and Detroit and Baltimore and all of these — Oakland is a mess. We’re not going to let this happen in our country. All run by liberal Democrats," Trump said.
  • "And you know what? If Biden got in, that would be true for the country. The whole country would go to hell. And we’re not going to let it go to hell."

Driving the news: Homeland Security is reportedly drafting plans to send roughly 150 federal agents into Chicago this week, the Chicago Tribune reports.

  • Roughly 2,000 Customs and Border Protection, Immigration and Customs Enforcement, Coast Guard and Transportation Security Administration officials are currently on standby for deployment to cities, the New York Times reports.
  • More protesters joined the fray in Portland after Oregon Public Broadcasting (OPB) reported that DHS officers and federal agents have detained demonstrators in unmarked vehicles without explanation.

DHS did not respond to a request for comment.

Details: Mark Pettibone, a Portland demonstrator, told the Washington Post that he was detained by "men in green military fatigues and generic 'police' patches" in an unmarked minivan last Wednesday. He said he was let go after being held at the federal courthouse.

What they're saying: Portland Mayor Ted Wheeler told NPR over the weekend that Trump ordering DHS' involvement "is an effort — a last-gasp effort by a failed president with sagging polling data who's trying to look strong for his base."

  • House Speaker Nancy Pelosi characterized the federal agents in Portland as "stormtroopers," calling their use an "egregious" abuse of power. House Democrats have called for an investigation.
  • "People cannot ignore what is happening in Portland and what may be coming to their city," Rep. Earl Blumenauer (D-Ore.) told his colleagues in the House on Tuesday.
  • "This rhetoric is unhelpful and gives the violence we have seen a pass. But President Trump will not give the violence a pass,” White House press secretary Kayleigh McEnany told reporters on Tuesday, in response to Pelosi.

Meanwhile: Democratic mayors in Portland, Atlanta, Chicago, Seattle, Kansas City, Mo., and Washington, D.C., on Monday condemned federal agents for dispersing protesters in their cities over the past two months, in letters to congressional leadership and the Trump administration.

A federal officer points to a protester in front of the Mark O. Hatfield U.S. Courthouse on July 20 in Portland. Photo: Nathan Howard/Getty Images
A federal officer pepper sprays a protester on July 20 in Portland. Photo: Nathan Howard/Getty Images
Protest organizers lead a crowd of about 1,500 people on July 20, 2020 in Portland. Photo: Nathan Howard/Getty Images
A protester kicks an entrance to the Mark O. Hatfield U.S. Courthouse on July 20 in Portland. Photo: Nathan Howard/Getty Images

Go deeper: Rand Paul denounces use of federal force in Portland

Go deeper

Updated Aug 10, 2020 - World

Protests erupt in Belarus after "Europe's last dictator" claims election win

Protesters and riot police clash in Minsk, Belarus, on Sunday during a demonstration against President Alexander Lukashenko's claim of a landslide victory. Photo: Misha Friedman/Getty Images)

Riot police clashed with protesters in Belarus overnight after a government exit poll predicted Sunday President Aleksander Lukashenko, an authoritarian who has ruled the Eastern European country since 1994, had overwhelmingly defeated a pro-democracy opposition candidate.

The latest: U.S. Secretary of State Mike Pompeo condemned the election as "not free and fair" on Monday and urged the Belarusian government to "refrain from use of force" against protesters who have taken to the streets. At least one person has died in the protests, while hundreds have been injured and thousands arrested.

Downtown Chicago hit by widespread looting

Police officers inspect a damaged Best Buy in Chicago that was looted and vandalized. Photo: Scott Olson/Getty Images

Chicago police responded to hundreds of people looting stores and causing widespread property damage in the city's downtown overnight, resulting in at least one exchange of gunfire, the Chicago Tribune reports.

The state of play: Police superintendent David Brown said the event was a coordinated response after an officer shot a suspect on Sunday evening, per CBS Chicago.

Updated 15 hours ago - World

U.S. officials condemn Belarus election and "senseless" protest crackdown

Belarus riot police detain a protester after polls closed in the presidential election in Minsk on Sunday, the first of two nights of unrest across the country. Photo: Siarhei Leskiec/AFP via Getty Images

Trump administration members, Democratic and Republican lawmakers and former Vice President Joe Biden expressed concern Monday over Belarus' weekend elections and subsequent brutal crackdown on protesters in the country.

Why it matters: President Aleksander Lukashenko, known as "Europe's last dictator," claimed to have won in a landslide against the pro-democracy opposition in a Sunday election widely viewed as rigged.