Mayor of Portland, Oregon, tear gassed by federal agents

Demonstrators protest in downtown Portland, Ore., Wednesday, July 22, 2020. Gov. Ted Wheeler faced a hostile crowd of protesters, who screamed at and sharply questioned him as he tried to rally demonstrators who have clashed repeatedly with federal agents sent in by President Donald Trump to quell ongoing unrest in the city. (AP Photo/Gillian Flaccus)

Federal officers disperse Black Lives Matter demonstrators at the Mark O. Hatfield United States Courthouse on Wednesday, July 22, 2020, in Portland, Ore. (AP Photo/Noah Berger)

Federal officers use chemical irritants and crowd control munitions to disperse Black Lives Matter protesters outside the Mark O. Hatfield United States Courthouse on Wednesday, July 22, 2020, in Portland, Ore. (AP Photo/Noah Berger)

Black Lives Matter protesters gather at the Mark O. Hatfield United States Courthouse on Tuesday, July 21, 2020, in Portland, Ore. Demonstrators removed portions of the boarding, which cover the building's ground floor, before federal officers used chemical irritants and rubber bullets to disperse them. (AP Photo/Noah Berger)

A federal officer pushes back demonstrators at the Mark O. Hatfield United States Courthouse on Tuesday, July 21, 2020, in Portland, Ore. A federal judge is hearing arguments on Oregon's request for a restraining order against federal agents who have been sent to the state's largest city to quell protests that have spiraled into nightly clashes between authorities and demonstrators.(AP Photo/Noah Berger)

A man passes graffiti near the Mark O. Hatfield United States Courthouse following a Black Lives Matter protest on Wednesday, July 22, 2020, in Portland, Ore. A federal judge is hearing arguments on Oregon's request for a restraining order against federal agents who have been sent to the state's largest city to quell protests that have spiraled into nightly clashes between authorities and demonstrators. (AP Photo/Noah Berger)

Black Lives Matter protesters gather at the Mark O. Hatfield United States Courthouse on Tuesday, July 21, 2020, in Portland, Ore. Demonstrators removed portions of the boarding, which cover the building's ground floor, before federal officers used chemical irritants and rubber bullets to disperse them. (AP Photo/Noah Berger)

A Black Lives Matter protester displays a pyrotechnic grenade he found on the street after federal officers used chemical irritants and rubber bullets to disperse demonstrators on Wednesday, July 22, 2020, in Portland, Ore. (AP Photo/Noah Berger)

Hundreds of Black Lives Matter protesters rally near the Mark O. Hatfield United States Courthouse on Tuesday, July 21, 2020, in Portland, Ore. (AP Photo/Noah Berger)

Smoke fills the sky as federal officers try to disperse Black Lives Matter protesters on Wednesday, July 22, 2020, in Portland, Ore. A federal judge is hearing arguments on Oregon's request for a restraining order against federal agents who have been sent to the state's largest city to quell protests that have spiraled into nightly clashes between authorities and demonstrators. (AP Photo/Noah Berger)

Federal officers prepare to disperse Black Lives Matter protesters at the Mark O. Hatfield United States Courthouse on Tuesday, July 21, 2020, in Portland, Ore. A federal judge is hearing arguments on Oregon's request for a restraining order against federal agents who have been sent to the state's largest city to quell protests that have spiraled into nightly clashes between authorities and demonstrators. (AP Photo/Noah Berger)

A federal officer pushes back demonstrators at the Mark O. Hatfield United States Courthouse on Tuesday, July 21, 2020, in Portland, Ore. A federal judge is hearing arguments on Oregon's request for a restraining order against federal agents who have been sent to the state's largest city to quell protests that have spiraled into nightly clashes between authorities and demonstrators.(AP Photo/Noah Berger)

Demonstrators protest in downtown Portland, Ore., Wednesday, July 22, 2020. Gov. Ted Wheeler faced a hostile crowd of protesters, who screamed at and sharply questioned him as he tried to rally demonstrators who have clashed repeatedly with federal agents sent in by President Donald Trump to quell ongoing unrest in the city. (AP Photo/Gillian Flaccus)