Protests have been held for a second night in several US cities after the election of Donald Trump as president – but with smaller crowds.
They were mainly young people saying a Trump presidency would create deep divisions along racial and gender lines.
However police in Portland said they were dealing with vandalism and aggressive behaviour.
In response, Mr Trump tweeted that the protests were “very unfair”.
Crowds of protesters gathered in cities across the US on Thursday evening.
Police in Portland, Oregon said the protest there should be considered a riot, with shop windows being broken, some demonstrators carrying bats and others arming themselves with rocks.
There were no reports of violence at the other protests, although demonstrators in Minneapolis briefly blocked an interstate highway in both directions.
In Philadelphia crowds gathered near City Hall holding placards bearing slogans such as “Not Our President”, “Trans Against Trump” and “Make America Safe For All”.
In Baltimore, police said a peaceful crowd of 600 people marched through the city, blocking traffic. In San Francisco high school students waved rainbow banners and Mexican flags.
Earlier, he met President Barack Obama at the White House and described him as a good man.
A small crowd also gathered outside Trump Tower in Chicago, a day after thousands marched through the city centre. Some passers-by cheered them but at least one driver shouted that they should “shut up and accept democracy”, the Associated Press news agency reported.
Protesters also returned to Trump Tower in New York for a second night.
In his tweet Mr Trump described them as “professional protesters” and said they had been “incited by the media”.
Meanwhile Mexico’s president said he was optimistic his country could have a positive relationship with the US under Mr Trump, despite his anti-Mexican rhetoric during the campaign.
Enrique Pena Nieto said he and Trump had agreed to meet, possibly during the transition period before Mr Trump’s inauguration in January.