Anti-Trump Protests Flare in Large US Cities for 3rd DayTens of thousands of people from New York to California filled the streets of large U.S. cities for a third day Thursday to demonstrate their dismay at Donald Trump's election to be the United States' 45th president. Demonstrations occurred from Portland, Oregon, to Chicago, to New York and parts in between and each typically drew a few hundred people, less than the thousands that gathered in various protests that surged after it became clear Trump had won Tuesday's election.  Late Thursday night, Trump went on Twitter to take on the protesters. Trump tweets: "Just had a very open and successful presidential election. Now professional protesters, incited by the media, are protesting. Very unfair!"  In Portland Thursday night thousands of people marched throughout the city, according to police, as protests turned violent, with people smashing store windows and lighting off firecrackers. Police declared the protests a riot, said there were people with baseball bats in the crowd and told people via loudspeaker to move on.\n\nOregon Department of Transportation officials closed portions of Interstate 5 and Interstate 84 in the area intermittently as a precaution. \n\nIn Denver, protesters managed to shut down Interstate 25 near downtown Denver briefly Thursday night.\n\nDenver police tweeted around 10 p.m. that demonstrators made their way onto the freeway and traffic was halted in the northbound and southbound lanes. Police say the interstate was reopened about half an hour later as the crowd moved back downtown.\n\nEarlier protests in Denver, Boulder and Colorado Springs on Wednesday and Thursday went off peacefully. Protesters briefly shut down interstate highways in Minneapolis as well. In Philadelphia, protesters near City Hall held signs bearing slogans like "Not Our President," "Trans Against Trump" and "Make America Safe For All." About 500 people turned out at a protest in Louisville, Kentucky, and in Baltimore, hundreds of people marched to the stadium where the Ravens were playing a football game. In San Francisco earlier Thursday, many of the marchers were African-American and Hispanic students. The demonstrators said the tone of Trump's campaign comments about immigration frightened them, and they accused him of racism and xenophobia. IN PHOTOS: Anti-Trump Protests Rage On Across US A large group of marchers made themselves heard outside the Trump Tower in New York City. They included pop superstar Lady Gaga, who stood on a truck waving a sign popularized by supporters of Trump's vanquished opponent, Hillary Clinton: "Love Trumps Hate." One New Yorker said he is afraid that Trump's avowed desire for "law and order" in American cities will result in police targeting more blacks for unfair and unwarranted searches and harassment. Watch video report from VOA's Zlatica Hoke: No media source currently available ​Hundreds of students stormed out of their classrooms Thursday in San Francisco and marched to the city's famous Fisherman's Wharf. "In our hearts, we are supporting the students," city schools superintendent Myong Leigh said. "This is technically not a school-sponsored activity. This is students taking their feelings and emotions and channeling them in a way that feels right to them." WATCH: New Yorkers React to Trump Presidency No media source currently available Some marchers in Los Angeles burned a large paper bust of Trump, and prepared new attempts to blockade the city's crowded auto freeways. Others in Oakland, near San Francisco, threw gasoline bombs and fireworks at police and blocked highways with garbage fires. At least 30 people were arrested. Some of Trump's harshest comments during the campaign were aimed at Mexican immigrants, many of whom he singled out as criminals and rapists. In campaign speeches, he has threatened mass deportations of immigrants living in the U.S. without legal residence or work permits. Trump also has directed tough words at Muslim-Americans, both immigrants and longtime U.S. residents. Many protesters believe Trump will fill vacancies on the nation's highest court by appointing political conservatives. A Trump presidency, they warn, could overturn laws protecting women's right to abortion and equal treatment for homosexuals, including in marriage. Trump has promised to be a president for all Americans, but he has not mentioned the protests or discussed his policy positions in detail since becoming president-elect. Watch: President's reaction to protests against election results No media source currently available Republican National Committee spokesman Sean Spicer told a television interviewer that this is the time for anti-Trump protesters to "get it out of their systems" and exercise their right to free speech, as long as "they give this man that was just elected very historically and his new vice-president an opportunity to govern." In conceding the election to her Republican opponents on Wednesday, defeated Democratic presidential candidate Hillary Clinton said, "Donald Trump is going to be our president. We owe him an open mind and a chance to lead."