With about nine weeks until Election Day, some of his advisers see an aggressive law and order message as the best way for the president to turn voters against his Democratic rival, Joe Biden, and regain the support of suburban voters.
Mr Biden said: “He may think that war in our streets is good for his re-election chances, but that is not presidential leadership — or even basic human compassion,"
The circumstances of Saturday night’s shooting in Portland remain unclear.
Ted Wheeler accused Mr Trump of 'racist attacks' on black people
AP
Video from the city shows sporadic fighting between groups, with Mr Trump’s supporters firing paintball pellets at opponents and using pepper spray as counter-protesters threw things at the Trump caravan.
The man killed was a member of Patriot Prayer, a right-wing group whose members have frequently clashed with protesters in Portland in the past, its founder, Joey Gibson, said on Sunday.
He identified the victim as Aaron ‘Jay’ Danielson and called him a “good friend,” but provided no details. Mr Danielson apparently also went by the name Jay Bishop, according to Patriot Prayer’s Facebook page.
Mr Trump retweeted the victim’s name and wrote: “Rest in peace Jay!”