They chanted, "We are here to stay".
Yasso, who said she was an immigration lawyer, said immigrants are terrified.
"We're going to go national, where we're all organizing together", he said in a telephone interview.
Several hundred people took to the streets and Portland authorities made multiple arrests after protesters threw bottles and other items at officers in riot gear and blocked streets and light rail lines.
On Saturday, demonstrators gathered in big cities like NY and Los Angeles, as well as in smaller places like Worcester, Massachusetts, and Iowa City, Iowa. About 300 people protested Trump's election as the next American president outside the U.S. Embassy near the landmark Brandenburg Gate in Berlin.
Kellyanne Conway, Trump's campaign manager, said on Fox News on Sunday that she was sure numerous protesters were paid professionals, though she offered no proof. Some are questioning the legitimacy of Trump's victory by noting that although he took the Electoral College, Clinton won the popular vote.
Protesters also waged rallies across the Western state of California, including in the major city of Los Angeles, where more than 200 were detained by police a night before. The march was peaceful, unlike a Friday night protest by 1,000 people that resulted in the arrests of 187 adults and eight juveniles, Los Angeles police said. Seventy-one people were arrested, mostly on charges of disorderly conduct and interfering with a police officer, CNN reported. On that night, a man was shot and wounded during a protest in which demonstrators threw projectiles at police.
Documentary filmmaker Michael Moore met with protesters on Saturday at Trump Tower in Manhattan, saying he wanted to talk with President-elect Donald Trump.
"I don't know what we can actually do to change things", protester Allen Meisner told CNN on Saturday, "but we have to keep coming and making sure his hatred and his fear and the anger that he's stirring up and using to get elected doesn't manifest itself in our country".
Many outdoor activities banned as fires burn across South
About half of those fires are in North Carolina, where thousands of firefighters are working around the clock. In light of the fires in western N.C., government tactics have gone underway for preventative measures.
"We reject the president-elect!" the crowd chanted as protesters started marching up Fifth Avenue.
Just before 9 p.m., police said protesters were dragging metal barricades onto MAX tracks.
While anti-Trump protesters are organising on social media, Trump credits the online platforms - he claims 28 million followers on Twitter alone - for helping him score an upset over Clinton. When a handful of demonstrators tried to stop traffic, they were warned by police, and then arrested.
The demonstrations Saturday night happened despite calls from the city's mayor and police chief for calm.
In Cincinnati, hundreds of protesters already had taken to the streets early Saturday afternoon to protest a jury's failure to reach a verdict in the trial of a white former police officer who killed an unarmed black motorist in 2015.
But almost all of the more than 100 people who were arrested on charges such as attempted assault on a peace officer and disorderly conduct will instead receive traffic citations for failing to obey a police officer, according to a joint statement from Portland police and the Multnomah County District Attorney's office.
"Protesters throwing burning road flares at police", tweeted the Portland Police.
Police briefly fired pepper balls into the crowd during the confrontation.