The coordinated rallies in Washington, New York, Los Angeles, Chicago and about 250 other cities featured speakers who blasted Trump for policies that many said hurt women and urged voters to turn out for congressional elections in November.
On Saturday, women and men in cities around the country participated in the national Women's March, which protested the president on the anniversary of his inauguration.
This year's march arrived just one day after Trump's attempt to block Planned Parenthood funding and amid a dramatic government shutdown centering on immigration.
"Beautiful weather all over our great country, a flawless day for all Women to March", he wrote. The organizers say they are less concerned with crowd size than with spreading their message. Afterward, a wave of women chose to run for elected office, and the #MeToo movement against sexual misconduct became a cultural phenomenon. That outpouring was itself the result of powerful men, including Hollywood titan Harvey Weinstein, being called to account for alleged sexual misconduct. According to a database kept by the organization, it appeared that dozens of both affiliated and unaffiliated marches and rallies were scheduled to take place. They aim to secure a million more voter registrations, pushing for more pro-women candidates to take office over the next few years.
While many signs last year drew from Hillary Clinton's concession speech after the 2016 election and statement that "women's rights are human rights", many in this year's crowd made reference to the growing "Me Too" movement, which aims to show the pervasive nature of sexual assault and harassment.
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"The march set the tone for the resistance", said US activist Linda Sarsour.
Bingham said that though Canada's political landscape is less overtly contentious, there is no lack of inequities to speak out against.
Sixth-grader Jasmine Flowers, 12, said she wanted to come to the Women's March to fight for everyone's right to vote.
"I've not seen any checks and balances", she said.
For Frances Olimpo of Toronto, that issue became the welfare of refugees. "This year, organizers say they are reaching out to local partners after a year of grass-roots work to try to access a cross section of America, from minorities to the disenfranchised to women in low-income communities".
She also led the crowd in a "I believe that we will win" chant before leaving the stage.
She said those sights stayed with her throughout the following year and motivated her to find ways to keep up her activism. Portman, an Academy Award victor, talked about feeling sexualized by the entertainment industry from the time her first film, Leon: The Professional, was released when she was 13 and suggested it's time for "a revolution of desire". Women in the U.S. illegally, sex workers and those formerly incarcerated are welcome, she said.