People participate in the second annual Women's March in Washington, D.C., January 20, 2018. 

Rallies were also held in New York City, Los Angeles, Denver, Chicago and about 250 other cities, including in Britain, Italy, Japan and other countries.

Anti-abortion protesters share the space with participants in the second annual Women's March outside the Lincoln Memorial in Washington, D.C., January 20, 2018.

People participate in the second annual Women's March in Washington, D.C., January 20, 2018. 

People participate in the Second Annual Women's March in Washington, D.C., January 20, 2018.

Lisa Lucas Gardner takes part in the Women's March on Washington, D.C., January 20, 2018.

Kavya Mishra (right), 16, participates in the second annual Women's March in Washington, D.C., January 20, 2018.

Jeri Burton makes a sign in preparation for a women's march rally in Las Vegas, Jan. 17, 2018. 

Last year's Women's Marches denounced President Trump (who had made sexually demeaning comments about women), and his views on abortion, immigration, religious freedom and LGBT rights.

In the wake of the last election, and with the rise of the #MeToo movement against sexual misconduct, this year's marches are also focusing on voter registration drives and the increase in the number of women running for political office in 2018.

People wearing pink "pussyhats" ride the subway at 42nd Street as they head toward the Women's March in New York City, January 20, 2018.

Marchers outside the Trump International Hotel at Columbus Circle in New York City, January 20, 2018.

Tens of thousands took part in the second annual Women's March in Manhattan, January 20, 2018.

People take part in the second annual Women's March in New York City, January 20, 2018.

Crowds on Central Park West spill off into Central Park during the Women's March in Manhattan, January 20, 2018.

A woman holds a poster as she attends the second annual National Women's March on January 20, 2018 in New York City.

Demonstrators participate in the 2nd annual Women's March in New York City, January 20, 2018.

Thousands hold signs and rally while attending the Women's March on January 20, 2018 in New York City. Across the nation hundreds of thousands of people are marching on what is the one-year anniversary of President Donald Trump's swearing-in to protest against his past statements on women and to celebrate women's rights around the world.

People take part in the Women's March in Manhattan, January 20, 2018.

People take part in the Women's March in New York City, January 20, 2018.

A sign seen on the first anniversary of the Inauguration of President Donald Trump, during the 2nd annual Women's March in New York City, January 20, 2018.

Signs are displayed during the 2nd annual Women's March in New York City, January 20, 2018.

People take part in the second annual Women's March in Manhattan, January 20, 2018.

People walk down Sixth Avenue as they participate in the Women's March in Manhattan, New York City, New York, U.S., January 20, 2018.

Members of a marching drum band march in New York during the Womens March on New York City on January 20, 2018 in New York City. /

Supporters attend the second annual Women's March in Chicago on January 20, 2018.

A woman holds a sign during the Second Annual Womens March Chicago on January 20, 2018.

Demonstrators attend the second annual Women's March Chicago on January 20, 2018.

A woman holds a sign during the second annual Women's March in Chicago, January 20, 2018.

CHICAGO, IL - JANUARY 20: People rally downtown for the Second Annual Womens March on January 20, 2018 in Chicago, Illinois. The march was held to encourage women to fight for womens rights and social justice through political engagement.

People take part in the Women's March in Chicago, Illinois, U.S., January 20, 2018.

CHICAGO, IL - JANUARY 20: People rally downtown for the Second Annual Womens March on January 20, 2018 in Chicago, Illinois. The march was held to encourage women to fight for womens rights and social justice through political engagement.

CHICAGO, IL - JANUARY 20: People rally downtown for the Second Annual Womens March on January 20, 2018 in Chicago, Illinois. The march was held to encourage women to fight for womens rights and social justice through political engagement.

CHICAGO, IL - JANUARY 20: People rally downtown for the Second Annual Womens March on January 20, 2018 in Chicago, Illinois. The march was held to encourage women to fight for womens rights and social justice through political engagement.

Bailey Gordon poses for a photo with her sign during the Women's March in Chicago, Illinois, U.S., January 20, 2018.

Crowds gather for the second annual Women's March in Philadelphia, January 20, 2018.

Women hand out pink hats as people arrive at the Second Annual Women's March in Philadelphia, January 20, 2018.

People participate in the Second Annual Women's March in Philadelphia, January 20, 2018.

Oscar Janicki, 6, participates in the second annual Women's March in Philadelphia, January 20, 2018.

A woman holds a sign in First Ward Park as she takes part in the "Remarchable Women" rally in Charlotte, North Carolina on January 20, 2018, marking the one-year anniversary of the Women's March.

Participants attend a "Respect Rally" to celebrate community victories, honoring the one-year anniversary of the Women's March, January 20, 2018 in Park City, Utah. /

A woman holds as sign as she takes part in a Women's March in Seattle, Saturday, Jan. 20, 2018. 

Diana Wadley, from Bellevue, Wash. and dressed as Wonder Woman, joins thousands at a rally at Cal Anderson Park prior to the Women's March on January 20, 2018 in Seattle.

A woman wearing a pink "pussyhat" attends the second annual Women's March in Cambridge, Massachusetts, January 20, 2018.

Carol Tierney (left), a participant in the second annual Women's March, and Mary Beth Geary, a supporter of President Donald Trump, express their opposing points of view at the rally in Cambridge, Massachusetts, January 20, 2018.

Caitlyn MacGregor attends the second annual Women's March in Cambridge, Massachusetts, January 20, 2018.

Eight year-old Charlotte Turchi holds a "Future Nasty Woman" sign during the local second annual Women's March in Cambridge, Massachusetts, January 20, 2018.

A participant holds up a sign during the Denver's Women's March in Denver, Colorado on January 20, 2018, one year after thousands of supporters marched around the world in defense of women's and human rights. 

Demonstrators march during the Denver's Women's March in Denver, Colorado on January 20, 2018, one year after thousands of supporters marched around the world in defense of women's and human rights. 

Participants gather at the Jefferson National Expansion Memorial National Historic Site during the Women's March for Truth on January 20, 2018 in St Louis, Missouri.

Participants listen to a speaker during the Women's March for Truth on January 20, 2018 in St Louis, Missouri.

Natalie White, 17, participates in the Women's March for Truth on January 20, 2018 in front of the Gateway Arch in St Louis, Missouri.

Demonstrators participate in the Women's March for Truth on January 20, 2018 in St Louis, Missouri.

Texas Handmaids lead a women's march to the Texas State Capitol on the one-year anniversary of President Donald Trump's inauguration, Saturday, Jan. 20, 2018, in Austin, Texas. 

A supporter of President Donald Trump holds a sign as a women's march heading to the Texas State Capitol passes on the one-year anniversary of President Donald Trump's inauguration, Saturday, Jan. 20, 2018, in Austin, Texas.

Jon Colgin, center, is put in handcuffs outside a rally before a women's march, Saturday, Jan. 20, 2018, in Austin, Texas. Colgin scuffled with another man after his "Make America Great Again" hat was taken away; he was detained and later released.

People hold their hands up at a Women's March against sexual violence and the policies of the Trump administration Saturday, Jan. 20, 2018, in Los Angeles.

People take part in the Women's March on Washington 2018: March On The Polls! on the National Mall on January 20, 2018 in Washington DC. /

People participate in the second annual Women's March outside the White House in Washington, U.S. January 20, 2018.

People gather at the Lincoln Memorial reflecting pool to rally before the Women's March on January 20, 2018 in Washington, D.C.