Hundreds of anti-Donald Trump protesters hold a demonstration in Washington Square Park on Nov. 11 as New Yorkers react to the election of Donald Trump as U.S. president. Spencer Platt | Getty Images

Protesters demonstrating against the election of Donald Trump gathered in several U.S. cities for a third night on Friday, hours after the president-elect praised their "passion." As darkness fell on Friday, thousands took to the streets of Miami, Atlanta, Philadelphia, New York, San Francisco and Portland, Oregon, voicing anger at Trump's inflammatory and often deeply controversial campaign rhetoric about immigrants, Muslims and women.

In Miami, several thousand activists marched through the downtown, with a few hundred making their way onto a highway, halting traffic in both directions.

In New York, demonstrators again gathered in Washington Square Park and by Trump Tower, where the Republican president-elect lives, on Fifth Avenue.

Trump, who initially denounced Americans who protested against his election, saying they had been "incited" by the media, reversed course and praised them on Friday.

"Love the fact that the small groups of protesters last night have passion for our great country. We will all come together and be proud!" Trump said on Twitter. The tweets were further evidence of Trump's mixed messages since he announced his candidacy 17 months ago. After Democrat Hillary Clinton conceded defeat early on Wednesday, he took a far more conciliatory tone than he had often displayed during his campaign and promised to be a president for all Americans. There were no reports of violence or arrests at Friday's rallies, unlike on Thursday night when demonstrators in Portland threw objects, damaging new cars at a dealership. Police there arrested at least 26 people. In Los Angeles on Thursday night, police arrested about 185 people, mostly for blocking roadways or being juveniles out past curfew, according to police. One officer was hospitalized for injuries suffered during the protest. Anti-Trump demonstrators have voiced concerns that his presidency, due to start on Jan. 20, would infringe on Americans' civil and human rights. They cited his campaign promises to restrict immigration and register Muslims, as well as allegations the former reality-TV star sexually abused women. Protesters in various cities have chanted slogans, including "No hate! No fear! Immigrants are welcome here!" and carried signs reading "Impeach Trump." White supremacist groups including the Ku Klux Klan have praised Trump's election, and some civil rights advocacy groups have reported a spike of attacks on minorities following Trump's victory on Tuesday. Trump has rejected the KKK's support. Most of the protests across the country, which have also taken place in Washington, D.C., and Los Angeles, have been largely comprised of young adults and college students.

Police advance on protesters who shut down the 101 freeway on November 9 in Los Angeles, California. David McNew | Getty Images