A dog is seen next to a toy made in the likeness of Donald Trump during the Women's March calling for equality, justice and an end to austerity in London, Britain January 19, 2019.

A woman takes part in a march organized by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019. REUTERS/Caitlin Ochs - RC189EBCB900

Baby Trump balloons float over thousands of people as they participate in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

Marchers carry signs as they participate in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

Linda Sarsour and Tamika Mallory, two of the organisers of the Women's March, walk together on Pennsylvania Avenue during the Third Annual Women's March in Washington, U.S., January 19, 2019.

Rep. Alexandria Ocasio-Cortez (D-NY) speaks during a march organised by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A woman wears "Love Trumps Hate" and "My Body My Choice" pins as she participates in the Third Annual Women's March at Freedom Plaza in Washington, U.S. January 19, 2019.

A demonstrator holds a sign calling for an equal rights amendment (ERA) during in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

A supporter of U.S. President Donald Trump carries a cardboard cut out amid his opponents during the Third Annual Women's March in Boston, Massachusetts, U.S., January 19, 2019.

A woman wearing clothes covered with the face of former U.S Democratic presidential nominee Hillary Clinton dances during the Third Annual Women's March in Boston, Massachusetts, U.S., January 19, 2019.

U.S. Representative Ayanna Pressley speaks at the Third Annual Women's March in Boston, Massachusetts, U.S., January 19, 2019.

Women wear wall protest outfits as they stand in front of the Trump International Hotel while participating in the Third Annual Women's March in Washington, U.S. January 19, 2019.

Participants listen to speakers outside City Hall during the Women's March in a -22 Celsius (8 Fahrenheit) wind chill snow storm in Toronto, Ontario, Canada January 19, 2019.

Demonstrators take part in the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A woman takes part in the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

Participants listen to speakers outside City Hall during the Women's March in a -22 Celsius (8 Fahrenheit) wind chill snow storm in Toronto, Ontario, Canada January 19, 2019.

Women wear liberty hats while participating in the Third Annual Women's March in Washington, U.S. January 19, 2019. REUTERS/Erin Scott - RC135C1411D0

Olivia Jennings of Brooklyn, New York poses for a portrait as thousands of people participate in the Third Annual Women's March in Washington, U.S. January 19, 2019. When asked “Why are you marching?” Jennings replied “I march for the LGBT community and for all women.”

Counter Protesters march down Pennsylvania Avenue as thousands of people participate in the Third Annual Women's March in Washington, U.S. January 19, 2019.

Protesters take part in the Women's March calling for equality, justice and an end to austerity in London, Britain January 19, 2019.

Demonstrators march past the Trump International Hotel during the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

Demonstrators take part in a march organised by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A partipant holds a sign about being furloughed in the U.S. federal government partial shutdown while participating in the Third Annual Women's March in front of the Trump International Hotel in Washington, U.S. January 19, 2019.

A demonstrator holds a sign critical of U.S. President Donald Trump during in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

Participants walk to the Ontario provincial legislature during the Women's March in a -22 Celsius (8 Fahrenheit) wind chill snow storm in Toronto, Ontario, Canada January 19, 2019.

A protester holds up a sign during the Women's March calling for equality, justice and an end to austerity in London, Britain January 19, 2019.

Demonstrators take part in a march organized by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A girl holds a rose as protesters take part in the Women's March calling for equality, justice and an end to austerity in London, Britain January 19, 2019.

"Pussy hats" are sold during a march organized by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A demonstrator holds up a vote sign as she marches past the Trump International Hotel during the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

A woman holds Trump caricature in front of the White House after the Third Annual Women's March in Washington, U.S., January 19, 2019.

Marchers and members of the Women's March Alliance pose for a group photo in front of the Trump International Hotel and Tower New York on Central Park West in the Manhattan borough of New York City, New York, U.S., January 19, 2019.

A snow plow clears the way ahead of the Women's March in a -22 Celsius (8 Fahrenheit) wind chill snow storm in Toronto, Ontario, Canada January 19, 2019.

A person tapes signs from a Women's March Alliance demonstration to a subway entrance at Times Square in the Manhattan borough of New York City, U.S., January 19, 2019.

Pat Oleszko, 73, wears her costume representing women of all colors with the Statues of Libery behind her, at the Women's Unity Rally in Foley Square, Manhattan in New York City, New York, U.S., January 19, 2019.

Illhan Ali of Rochester, New York poses for a portrait as thousands of people participate in the Third Annual Women's March in Washington, U.S. January 19, 2019. When asked “Why are you marching?” Ali replied “I march for immigration and women's rights.”

Debby Kurylo (L) and Valerie Moro of Alexandria, Virginia pose for a portrait as thousands of people participate in the Third Annual Women's March in Washington, U.S. January 19, 2019. When asked “Why are you marching?” they replied “We march for equality and women's rights.” REUTERS/Michael McCoy - RC1C12CA8C90

A woman dressed as suffragette gestures during the Women's March calling for equality, justice and an end to austerity in London, Britain January 19, 2019. Reuters/Simon Dawson

A protester with a banner chants slogans as she takes part in the Women's March calling for equality, justice and an end to austerity in London, Britain January 19, 2019.

Demonstrators take part in a march organized by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

Demonstrators emphasizing gun violence take part in a march organized by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

Thousands of people participate in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

Thousands of people participate in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

Demonstrators take part in a march organized by the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A woman holds an anti-Trump poster in front of the White House after the Third Annual Women's March in Washington, U.S., January 19, 2019.

Participants chant as they march up Pennsylvania Avenue during the Third Annual Women's March in Washington, U.S. January 19, 2019.

A demonstrator wears a sign critical of U.S. President Donald Trump during in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

A demonstrator holds up a sign critical of U.S. President Donald Trump during in the Third Annual Women's March in front of the White House in Washington, U.S., January 19, 2019.

A demonstrator holds a sign during in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.

A Trump supporter attends the Women's Unity Rally in Foley Square, Manhattan in New York City, New York, U.S., January 19, 2019.

The "Spirit of 2019" fife and drum group arrives at the third annual Women's March in Boston, Massachusetts, U.S., January 19, 2019.

Participants leave in a school bus following the Third Annual Women's March in Boston, Massachusetts, U.S., January 19, 2019.

A participant wears the words "Girls Rule" on her head during the Third Annual Women's March in Boston, Massachusetts, U.S., January 19, 2019. REUTERS/Brian Snyder

An elderly female supporter marches with the help of a walker on Central Park South during the Women's March Alliance demonstration in the Manhattan borough of New York City, New York, U.S., January 19, 2019.

A marcher holds the Puerto Rican flags in a sea of supporters as they march down 6th Avenue and 55th Street during the Women's March Alliance demonstration in the Manhattan borough of New York City, New York, U.S., January 19, 2019.

A demonstrator holds a sign during the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A woman wearing a "pussy hat" rides the subway after participating in the Women's March Alliance in the Manhattan borough of New York City, U.S., January 19, 2019.

A young boy is guided through the crowd by his Father during the Women's March NYC demonstration at Foley Square in the Manhattan borough of New York City, New York, U.S., January 19, 2019.

Representative Alexandria Ocasio-Cortez and Representative Yvette Clarke share a smile during the Women's March NYC demonstration at Foley Square in the Manhattan borough of New York City, New York, U.S., January 19, 2019.

Demonstrators hold signage and flags in the upper concourse of Grand Central Station during Non-March for Disabled Women hosted by Rise and Resist with help from the Women's March NYC in Grand Central Station in the Manhattan borough of New York City, New York, U.S., January 19, 2019.

Erica Johnson of Columbia, Maryland poses for a portrait as thousands of people participate in the Third Annual Women's March in Washington, U.S., January 19, 2019. When asked “Why are you marching?” Johnson replied “I march for the young minority women.” REUTERS/Michael McCoy - RC14027EDC10

Protesters take part in the Women's March calling for equality, justice and an end to austerity in London, Britain January 19, 2019.

Thousands of people participate in the Third Annual Women's March at Freedom Plaza in Washington, U.S., January 19, 2019.