
Thirteen people were arrested in Portland, Oregon, after a small group protesting President Donald Trump clashed with the police.

The demonstrators, who did not have a permit, spilled out onto the streets outside the Federal Building and failed to heed the warnings of police in tactical gear.

The protest was just one of several held across the country as part of the 'not my Presidents' Day' rallies against Trump.

Planned marches took place in New York, Los Angeles, Washington DC, Chicago and Salt Lake City to mark President's Day while unofficial demonstrations with the same theme cropped up elsewhere.

Protesters even greeted the president on the route from his Mar-a-Lago home to Palm Beach Airport where he boarded Air Force One to return to Washington DC in the afternoon.

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The demonstrators, who did not have a permit, spilled out onto the streets outside the Federal Building in Portland, Oregon, and failed to heed the warnings of police in tactical gear

Margaret Ann Zebroski (pictured) was among the 13 people who were arrested. She had a bloodied nose after she was knocked to the ground and one witness questioned whether police were using excessive force

Police gave protesters verbal warnings to clear the streets. Eight were arrested at SW 3rd Avenue and Madison Street, and another five were arrested blocks away at Southwest 6th Avenue and Salmon Street

Portland police faced off against a group of protesters who were not a part of a planned demonstration later in the day

The planned protest, held an hour later with permitted street closures, occurred without problems with the police. Police deployed pepper spray and 'less-than-lethal munitions' in the earlier clash with protests

One protester dressed as a founding father held a sign declaring Trump was not his president. Another man held a sign that read 'yes you can' in Spanish

Police warned demonstrators in Portland on Monday morning about blocking the roads near the Edith Green-Wendell Wyatt Federal Building at around 11am.

'Officers on bicycles and on foot attempted to maintain order but required assistance from Rapid Response Team officers,' according to a statement issued by the police.

Law enforcement used pepper spray and 'less-than-lethal munitions' in clashes with the protesters.

Eight were arrested at SW 3rd Avenue and Madison Street, and another five were arrested blocks away at Southwest 6th Avenue and Salmon Street.

They consisted of seven adults and six juveniles, all of whom received a traffic citation for failing to obey the police.

Video footage of the arrests show several people pressed to the ground with their arms behind them. Among them was Margaret Ann Zebroski, 66, with a bloodied nose after she was knocked to the ground and arrested.

Ben Thomas questioned whether the police were exercising excessive force, telling the local news channel: 'She was blocking traffic, but is that really worth knocking her to the ground to arrest her? I don't think so.'

A larger rally with permitted street closures was held later in the afternoon without incident, police said.

Protesters filled Central Park West on Monday as part of a 'Not My Presidents' Day' demonstration against Donald Trump

New York: The activists held signs slamming Trump and Vice President Mike Pence as they marched

New York: A protester joins crowds at Central Park West, a stone's throw from Trump's Manhattan bolthole on 5th Avenue

New York: The crowds waved American flags as they marched from noon into the late afternoon for the Presidents' Day protest

In New York, 15,000 people RSVPed to the event on Facebook. Police couldn't confirm whether any arrests had been made on Monday afternoon but the demonstration is thought to have been peaceful.

The organizers wrote on the event page: 'Donald Trump is literally our President, but figuratively, he has attacked every value New Yorkers embody and does not represent our interests.

'We will be staging a rally at Columbus Circle to protest the un-American policies of the current White House.

'He governs as if there's no resistance but there is and on February 20th, we will honor previous presidents by exercising our constitutional right to assemble and peacefully protest everything Donald Trump stands for,' a Facebook announcement of the rally said.

Among their grievances is Trump's plan to cut federal funding to the state to 'turn us against our immigrant population'.

The Los Angeles event was the first to be organized. Its organizers are demanding that Trump face impeachment for his 'Islamophobic' and 'unethical' policies.

New York: activists held a banner to advocate women's rights. In signs they branded Trump a 'fascist' as they marched at Columbus Circle

New York: Activists used some of the president's favorite complaints against him in their signs. One deemed him 'fake', a description he often gives the mainstream media

New York: School children joined the crowds at Columbus Circle bearing signs which read 'Not my president' and 'you re a good president - not!'

New York: Protesters with their homemade signs in New York City. Some labeled the president a 'dump'. One protester dressed up as a beauty queen with hands grabbing at her in a nod to Trump's run in with former pageant winners during the election

New York: The New York City protest was at on the doorstep of the president's Manhattan hotel

New York: The event was organized on Facebook and drew crowds including young children who joined in with their own signs

New York: A common theme among protesters was anger over Trump's immigration ban and threats against undocumented workers

New York: The were expected to gather tens of thousands of people across the country on Monday. It's not yet clear how many turned out though big crowds had gathered by the late afternoon

New York: Protesters wore 'dump' underwear with Trump's face on the behind in another gesture of protest

New York: Street sellers cashed in on the occasion in New York City by selling t-shirts with the slogan 'not my president'

In New York, protesters stretching at least eight blocks chanted: 'He cheats, he lies, open up your eyes' near the Trump International Hotel on the edge of Central Park.

'I think he's got a mean personality,' said marcher Edith Cresmer, a 78-year-old urban planner. 'But the worst thing about him is how he incited peoples' fears and pits them against each other.'

Luis Llobera, 38, and his wife and baby took a train from Westchester County north of the city attend the Trump protest.

'We are not American citizens but our son is,' he said as his wife cradled their 7-month-old, Atlas. 'We want to make sure our son has a government that is right and good.'

Los Angeles was the first protest organized under the hashtag. Activists there showed off their commitment to the cause by dressing up in costume to mock the president.

There were no arrests at the L.A. protest.

In downtown Chicago, about 1,200 people gathered across the Chicago River from the Trump International Hotel and Tower.

Los Angeles: Crowds gathered outside City Hall in Los Angeles on Monday morning for a West Coast effort against the president

Los Angeles: protesters carried enormous signs outside City Hall which bore unflattering portraits of the president

Los Angeles: In California, protesters carrying signs demanding that the president face impeachment

Los Angeles: Protesters in California were in high spirits. Many came dressed in costume while others painted themselves orange to mock the president's skin tone

Los Angeles: Three protesters painted themselves orange to illustrate the imaginary condition they believe has overcome the president

Los Angeles: Activists in California poked fun at the president's hair and also demanded he reveal his tax returns

Los Angeles: A child holds up a sign reading 'defend the constitution' with a badge in the corner reading 'not my president'

Signs spotted in the crowd included My body My Choice and 'Jesus was a refugee,' references to Trump's anti-abortion stance and his efforts to stop admission of refugees.

As people gathered, a group of 25 local musicians called themselves #SAHBRA, 'Sousaphones Against Hate, Baritones Resisting Aggression,' played songs to lighten the mood.

With Monday being a day off for many schools, many parents brought their children to the protest.

Eileen Molony, a photographer from Oak Park, had her 12-year-old son and 9-year old daughter in tow.

'As an immigrant family we feel strongly against the ban,' she said. 'We feel America is about inclusion, but everything Trump has shown is that he´s about division.'

Chicago police reported no arrests in the protest, the latest in a series since Trump's Jan. 20 inauguration.

Palm Beach, Florida: Protesters even turned out to line the route the president's motorcade traveled from his Palm Beach home to the airport on Monday

Palm Beach, Florida: The protesters held up signs labeling Trump a 'total meltdown' on the route to the airport

Chicago: A female protester held up a bright pink 'not mine' sign while others demanded to see what the president was 'hiding' by not releasing his tax returns

Chicago: A man holds up a sign calling for protesters to say 'Nyet' - the Russian word for no - to treason in a jab at the president's ties with Putin

Chicago: Women hold signs demanding Trump's impeachment as they take part in a rally in Chicago

Chicago: A young Muslim girl holds up a sign reading 'we need extreme vetting for presidents not refugees!' at the protest in downtown Chicago

Chicago: Protesters hold up signs in Spanish and English protesting against Trump's 'fascist' America

The protests come after another weekend of outrage against the Republican president which drove activists in the US and abroad to the streets in protest.

Celebrities including Susan Sarandon and Russell Simmons joined a Muslim protest in Times Square on Sunday where crowds admonished the 'fascist USA' Trump has created.

Mayor Bill de Blasio and Governor Andrew Cuomo were also in attendance. Simmons, a one-time friend of the billionaire, gave him credit for unifying crowds in protest.

'We are here, unified, because of Donald Trump, so we won’t speak too harshly of him tonight – today. We want to thank him for bringing us together,' he said.

Washington DC: Protesters filled the streets in Washington DC as they marched past the White House in a Presidents' Day protest

Washington DC: Protesters flocked to DuPont Circle in the nation's capital to protest against the president on Monday

Washington DC: Protesters wore clownish mass to resemble the president and carried bags of Cheeto puffs - a mocking reference to his bright tan

Washington DC: Other groups took on Trump's campaign slogan and twisted it to 'F*** Trump, Keep America Great Again'

Washington DC: 10-year-old Marcel Ast from New Jersey holds up a sign reading 'impeach now' as he's hoisted up on someone's shoulders

Austin, Texas: In Texas there were unofficial protests against Trump in honor of Presidents' Day

Austin, Texas: Jane Shimkus, a resident of Austin, Texas, used Trump's 'bad hombres' quip against him to demand that he be 'deported' from the White House

Salt Lake City, Utah: Residents in Salt Lake City, Utah, also turned out to share their anger over Trump's administration

Salt Lake City, Utah: A protester holds up a sign slamming Trump's immigration policies at the protest in Salt Lake City

Philadelphia: Protesters came out in force just one day after a climate-change march was held

Philadelphia: Protesters held signs denouncing Trump and calling for his impeachment. Pictured right, police on bicycles forming a wall during the protest

There were also protests in Chicago, Los Angeles and Boston where activists lashed out against the 'threat to science' they say Trump's administration is harboring.

Environmental groups and scientists came together for the protest against what they described as an 'anti-science rhetoric' coming from the White House.

The president arrived back in Washington DC on Monday night after holding a rally in Florida on Saturday, where he greeted crowds of fans.

Thousands of his supporters packed an air hangar in Melbourne to hear him continue his assault on the mainstream media in a fired up speech.

First Lady Melania Trump also delivered some rare public remarks at the campaign-style rally.

President Trump was in Florida over the weekend where he gave a fired-up speech to fans at a campaign-like rally in the town of Melbourne on Saturday

The president arrived back in Washington DC on Monday night after spending a long-weekend at his Mar-a-Lago estate in Florida