Fresh protests erupted in several US cities for a second night as coast to coast demonstrations witnessed thousands of people filling the streets, including at the White House and outside Trump's properties.
Reports of protests came in from cities like New York, San Francisco, Colorado, Los Angeles, and Seattle. While most protesters were peaceful, dozens were arrested.
In his first reaction to the massive protests, Trump accused the media of inciting "professional protesters" against him.
"Just had a very open and successful presidential election. Now professional protesters, incited by the media, are protesting.
"Very unfair!" Trump tweeted after he reached New York following a day of hectic meetings in Washington DC.
During the day, he met outgoing US President Barack Obama, after which he met Speaker of the House of Representative Paul Ryan and other leaders of the US Congress.
Thursday, people in huge numbers rallied in at least 25 US cities - including New York and Nashville, Chicago and Cleveland, San Francisco and Seattle - shouting anti-Trump slogans, burning effigies, and holding candlelight vigils to mourn result of the general election in which Trump secured a stunning victory despite his explosive and divisive rhetoric.
The White House said people have constitutional rights to protest but these protests need to be peaceful.
"I think the first thing the President would say is that we've got a carefully, constitutionally protected right to free speech, and the President believes that that is a right that should be protected.
"It is a right that should be exercised without violence," the White House Press Secretary Josh Earnest said when asked about President Obama's view on this.
Multiple news outlets are reporting that police detained several people at an anti-Donald Trump protest turned riot after protesters broke out the windows of businesses and started a dumpster fire in Portland's central Pearl District.
Demonstrations were continuing in the square as well as on nearby city streets with protesters chanting a myriad of phrases including, "We reject the President-elect." Police estimated about 4,000 protesters took to Portland streets on Thursday nigh.
Anti-Donald Trump protesters marched down the streets of Oakland, California on Thursday for a second straight night. Demonstrations began nationwide on Wednesday, after Trump was elected President.
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