MIDTOWN, Manhattan -- Anti-Trump protests are continuing for the second night in a row following the unexpected election of Donald Trump as president, with thousands marching in New York City, Philadelphia, Baltimore and Grand Rapids, Michigan.
Hundreds of people have gathered outside Trump Tower in midtown Thursday chanting "Not Our President" and "F--- Trump."
The protests started Wednesday night, less than a day after Trump was elected president.
President-elect Donald Trump returned to Twitter Thursday night, taking 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!"
Thousands have been gathering in cities from New York to Dallas to San Francisco to voice opposition to Trump's election.
Trump's complaint Thursday about the media echoes the rhetoric of his campaign, when he railed against the press as "disgusting" and "dishonest."
A few minutes earlier, Trump was more positive about his trip to Washington, tweeting: "A fantastic day in D.C. Met with President Obama for first time. Really good meeting, great chemistry. Melania liked Mrs. O a lot!"
In Philadelphia, a crowd that included parents with children in strollers gathered Thursday night near City Hall. They held signs bearing slogans like "Not Our President," ''Trans Against Trump" and "Make America Safe For All."
Los Angeles Mayor Eric Garcetti has condemned anti-Trump demonstrators who damaged property and blocked traffic.
But he also said Thursday he's proud of the thousands of people who took to streets peacefully on Wednesday.
The mayor, a Democrat and grandson of a Mexican immigrant, said he might have hit the bricks as well if he was younger. He called the peaceful demonstrations "a beautiful expression of democracy."
On Thursday, a few dozen people again blocked a freeway in the Boyle Heights area. Authorities cleared one group but a second continued to block an onramp.
Police at a Central Texas university want to know who is behind fliers posted on campus that urge formation of "tar and feather vigilante squads" to "arrest and torture" campus diversity advocates.
The fliers posted around the Texas State University campus Thursday morning featured a picture of armed white men labeled "Texas State Vigilantes" beneath a U.S. flag. It professes support for President-elect Donald Trump and Republican majorities in Congress. Aside from the acts against diversity advocates, the flier also urges augmenting a border wall by irradiation with nuclear waste and stocking the Rio Grande with alligators and piranhas. It also urges the sabotage of campus toilets.
Campus police Sgt. Rolando Belmares says at least five fliers were posted around the San Marcos campus before a campus anti-Trump demonstration.
High school students in San Francisco chanted "not my president" and waved rainbow and Mexican flags as they marched through the city's downtown in protest of Republican Donald Trump's presidential win.
The San Francisco Unified School District said Wednesday that more than 1,000 students staged a citywide walkout on Thursday.
Bystanders in the heavily Democratic city high-fived them from the sidelines.
Thousands have taken to the streets around the country since Tuesday's election. Demonstrators have disrupted traffic, burned a giant papier-mache Trump head and declared that they refused to accept Trump's victory.
Demonstrations have been held in New England, the Midwest and the West Coast.
Trump supporters have taken to social media to express their scorn of the protests, saying demonstrators are hypocrites for not accepting the democratic process because they don't like the results.
Several hundred people flooded onto one of the busiest freeways in Los Angeles, causing a miles-long traffic backup in protest of the presidential election of Donald Trump.
The protesters, who had remained peaceful and not overly disruptive for most of the night, poured on to U.S. 101, which links downtown LA to Hollywood, and stayed there for most of an hour. Drivers sat and waited. Many got out of their cars.
The crowd was slowly starting to disperse as many of the demonstrators left the freeway and others were taken into police custody.
There was no violence between officers and protesters.
The demonstrators were among thousands who took to streets in protest of Trump across the country, from New York to Texas to much of the West Coast.
The Associated Press contributed to this report.