University of California, Davis students protest on campus in Davis, California, U.S. following the election of Donald Trump as President of the United States November 9, 2016. REUTERS/Max Whittaker

A woman yells as she takes part in a protest against President-elect Donald Trump, Wednesday, Nov. 9, 2016, in Seattle's Capitol Hill neighborhood. (AP Photo/Ted S. Warren)

A trash fire burns during protests in Oakland, Calif., late Tuesday, Nov. 8, 2016. President-elect Donald TrumpÄôs victory set off multiple protests. (Anda Chu/Bay Area News Group via AP)

An Oakland police officer checks out damage after a window was broken by protesters at a car dealership in downtown Oakland, Calif., on Wednesday, Nov. 9, 2016. President-elect Donald TrumpÄôs victory set off multiple protests. (Jane Tyska/Bay Area News Group via AP)

Madeline Lopes, left, and Cassidy Irwin, both of Oakland, march with other protesters in downtown Oakland, Calif., early Wednesday, Nov. 9, 2016. President-elect Donald TrumpÄôs victory set off multiple protests. (Jane Tyska/Bay Area News Group via AP)

Police officers walk past an overturned newspaper rack during protests in Oakland, Calif., late Tuesday, Nov. 8, 2016. President-elect Donald TrumpÄôs victory set off multiple protests. (Anda Chu/Bay Area News Group via AP)

University of California, Davis students protest on campus in Davis, California, U.S. following the election of Donald Trump as President of the United States November 9, 2016. REUTERS/Max Whittaker/File Photo

A man holds placards at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

A woman holds a placard at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

A man holds a placard at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay FOR EDITORIAL USE ONLY. NO RESALES. NO ARCHIVES

People hold placards at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

Demonstrators protest against the election of U.S. president-elect Donald Trump in front of the White House in Washington November 9, 2016. REUTERS/Kevin Lamarque

A woman holds a placard at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

People hold placards at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

People hold placards at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

A supporter of the far-right English Defence League group expresses his views to media during a protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

A supporter of the far-right English Defence League group is restrained by police during a protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

People hold placards at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

People hold placards at an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. REUTERS/Hannah McKay

Placards lay on the floor during an anti-racism protest against U.S. President-elect Donald Trump outside of the U.S. Embassy in London, Britain, November 9, 2016. Picture rotated 180 degrees. REUTERS/Hannah McKay

Two young women hold up a sign reading "nasty women unite" in protest to the election of Republican Donald Trump as President of the United States in Berkeley, California, U.S. November 9, 2016. REUTERS/Elijah Nouvelage

Alice Bynum (C) stands with other Berkeley High School staff members and holds a sign while attending a protest about the election of Republican Donald Trump as President of the United States in Berkeley, California, U.S. November 9, 2016. REUTERS/Elijah Nouvelage

Berkeley High School students begin to march after assembling in front of Sproul Hall on the UC Berkeley campus in protest to the election of Republican Donald Trump as President of the United States in Berkeley, California, U.S. November 9, 2016. REUTERS/Elijah Nouvelage

A young man wearing a Berkeley High Class of 2016 shirt wipes away ters during a protest in response to the election of Republican Donald Trump as President of the United States in Berkeley, California, U.S. November 9, 2016. REUTERS/Elijah Nouvelage

Berkeley High School students assemble on the UC Berkeley campus in protest to the election of Republican Donald Trump as President of the United States in Berkeley, California, U.S. November 9, 2016. REUTERS/Elijah Nouvelage TEMPLATE OUT

Protesters walk in the middle of traffic lanes after Donald Trump's election victory, Tuesday, Nov. 8, 2016 in downtown, Portland, Ore. Portland police made no arrests during Tuesday night's post-election protest. (Stephanie Yao Long//The Oregonian via AP)

Protesters walk in the middle of traffic lanes after Donald Trump's election victory, Tuesday, Nov. 8, 2016 in downtown, Portland, Ore. Portland police made no arrests during Tuesday night's post-election protest. (Stephanie Yao Long//The Oregonian via AP)

People protest on the University of Connecticut campus against the election of Republican Donald Trump as President Wednesday, Nov. 9, 2016, in Storrs, Conn. (AP Photo/Pat Eaton-Robb)

A supporter of the far-right English Defence League group is restrained by police after shouting his views, and disrupting an anti-racism protest against U.S. President-elect Donald Trump winning the American election, outside the U.S. embassy in London, Wednesday, Nov. 9, 2016. (AP Photo/Matt Dunham)

The election of Donald Trump to the presidency sparked protests in the United States.

Demonstrators smashed windows and set bins on fire early Wednesday in Oakland, California.

And in Oregon, dozens of people blocked traffic in Portland causing delays for trains on two rail lines.

Media reports said the crowd grew to about 300 people, including some who sat in the middle of a road. The crowd of anti-Trump protesters burned American flags and chanted, "That's not my president."

Expand Close A woman yells as she takes part in a protest against President-elect Donald Trump, Wednesday, Nov. 9, 2016, in Seattle's Capitol Hill neighborhood. (AP Photo/Ted S. Warren) AP / Facebook

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In Pennsylvania, hundreds of University of Pittsburgh students marched through the streets, with some in the crowd calling for unity. The student-run campus newspaper, the Pitt News, tweeted about an event titled "Emergency Meeting: Let's Unite to Stop President Trump."

In Seattle, about 100 protesters gathered in the Capitol Hill neighborhood, blocked roads and set a trash bin on fire.

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On Twitter, the hashtag "NotMyPresident" had been used nearly half a million times.

The Oakland protest grew to about 250 people by late Tuesday. Police Officer Marco Marquez said protesters damaged five businesses, breaking windows and spraying graffiti. No arrests were made.

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A woman was struck by a car and badly injured when protesters got on to a main road, the California Highway Patrol said. Demonstrators vandalised the driver's SUV before officers intervened. The road was closed for about 20 minutes.

Elsewhere in California, more than 1,000 students at Berkeley High School staged a walk-out and marched to the campus of the University of California.

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"We're sitting here, setting our clocks back to 1950 electing this fool. You know? Trump honestly just makes us realize how much hate and ignorance is left," a female student told the rally, monitored via the social media app Periscope.

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Students also walked out of two high schools in Oakland as well as a school in Phoenix, Arizona.

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Police said at least 500 people swarmed streets in and around the UCLA campus, some shouting anti-Trump expletives and others chanting "Not my president!"

Smaller demonstrators were held at other University of California campuses and neighbourhoods in Irvine and Davis, and at California State University, San Jose.

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In downtown Los Angeles, a mostly Latino group of about 300 high school students, mostly from the Miguel Contreras Learning Complex, walked out of classes and marched to the steps of City Hall, where they held a brief but boisterous rally. Several school officials accompanied the youths as chaperones.

Chanting in Spanish, "The people united will never be defeated," the group held signs with slogans such as "Not Supporting Racism, Not My President," and "Immigrants Make America Great."

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A representative of the Trump campaign could not be reached immediately for comment.

About a fourth of the students from Miguel Contreras are members of the so-called "Dreamers" generation, children whose undocumented parents entered the United States with them illegally, school officials said, and fear of deportation under a Trump administration is a major concern.

One of Trump's marquee campaign pledges was to build a wall along the border with Mexico to keep out undocumented immigrants and deport en masse those who immigrated illegally.

"A child should not live in fear that they will be deported. They should not live in fear that they themselves will be deported," said Stephanie Hipolito, one of the student organizers of the walkout. She said her parents are U.S. citizens.

"We're not criminals. We're not drug dealers. We're hard-working people looking for the American dream like anybody else," she said.

Anti-Trump rallies were planned later Wednesday in New York, Boston, Chicago and other cities as well, according to social media postings. A Facebook page for a protest scheduled for Manhattan's Union Square Park showed more than 8,000 people planned to attend.

Expand Expand Previous Next Close Demonstrators protest against the election of U.S. president-elect Donald Trump in front of the White House in Washington November 9, 2016. REUTERS/Kevin Lamarque REUTERS A protester waves a Mexican flag as others gather to protest to the election of Republican Donald Trump as the president of the United States outside City Hall in Los Angeles, California U.S., November 9, 2016. REUTERS/Mario Anzuoni TEMPLATE OUT REUTERS / Facebook

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In Austin, Texas, about 400 people staged a peaceful protest march through the streets of the Texas capital, police said.

There were also protests in Portland, Oregon, San Francisco and Seattle, where police said a shooting that left five people seriously injured was not connected to the rally.

In New York, several groups of protesters caused massive gridlock as police mobilised to contain them under a light rain.

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They held signs that read "Trump Makes America Hate" and chanted "hey, hey, ho, ho Donald Trump has got to go" and "Impeach Trump".

However Republicans claimed a mandate for the president-elect, and an emotional Hillary Clinton earlier told crestfallen supporters he deserved a "chance to lead".

President Barack Obama pledged a smooth transition of power, and has invited the man he had declared unfit for the presidency to the White House on Thursday.

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"We are now all rooting for his success in uniting and leading the country," the president said of Mr Trump, who spent years questioning Mr Obama's birthplace and challenging the legitimacy of his presidency.

Mr Trump was uncharacteristically quiet in the aftermath of his triumph and made no public appearances on Wednesday.

He huddled with jubilant advisers at his skyscraper in Manhattan, beginning the daunting task of setting up an administration that will take power in just over two months.

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He also met Vice President-elect Mike Pence and took calls from supporters, family and friends, according to spokeswoman Hope Hicks.

In Washington, Mr Trump's transition team sprang into action, looking through personnel lists for senior jobs and working through handover plans for government agencies.

Mr Trump was expected to consider several loyal supporters for senior jobs, including former New York mayor Rudy Giuliani for attorney general or national security adviser.

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After struggling for months with Mr Trump's takeover of their party, Republican leaders embraced the businessman in victory.

House Speaker Paul Ryan, who was lukewarm in his support throughout the campaign, praised him for pulling off "the most incredible political feat I have seen in my lifetime".

Mr Ryan said: "He just earned a mandate."

Indeed, Mr Trump will take office in January with Congress fully in his party's control, giving him strength to try to pass his agenda and turn the Supreme Court in a conservative direction.

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Even Republicans were stunned by the scope of their electoral success, including many who had been privately predicting Mr Trump's defeat.

Mrs Clinton's emotions were raw as she addressed a crowd of supporters, eyes wet with tears, who gathered in a New York ballroom.

She said the crushing loss was "painful and it will be for a long time" and acknowledged that the nation was "more divided than we thought".

Still, she was gracious in defeat, declaring: "Donald Trump is going to be our president. We owe him an open mind and the chance to lead."

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