WASHINGTON (CNN) -- Women of all generations streamed on to the National Mall Saturday morning, gathering for the Women's March on Washington to push back on the Republican agenda and offer a sharp rebuke of President Donald Trump's history of derogatory comments about women.
After a day of grandeur, pomp and circumstance for Trump, buses and planes of protesters arrived in the nation's capital Friday night and Saturday morning. Women in pink hats with cat ears -- the now universal symbol of anti-Trump sentiment -- filled the sidewalks near the metro and Amtrak hub at Union Station, a venue that housed a Trump gala for donors and friends just two nights ago.
The event, formally called the Women's March on Washington, has drawn women with many disparate agendas, leading to some confusion and controversy about the central message in the weeks leading up to the march.
GALLERY: The best signs from the Women's March on Washington
But many of the women traveling to Washington said they wanted to bring attention to reproductive rights, the proposed rollback of former President Barack Obama's health care law and the fight for equal pay for men and women.
Following anti-Trump protests that became heated Friday, the mood among marchers Saturday was jovial and even celebratory as old friends from across the country greeted one another and mothers and daughters walked hand in hand through the crowd.
Some wore white and blue sashes that said "dissent is patriotic." Many carried signs that said "Women Won't Back Down." Others bore placards with more colorful references to Trump: "Nasty Women rock" and "Keep your tiny hands off our rights."
GALLERY: Click here to see photos from the women's march in Washington, D.C.
In interviews, marchers said they were hoping to maintain a positive vibe -- a respectful demonstration of democracy and expression of free speech.
Democratic Rep. Debbie Dingell said that some 7,500 people were coming from her home state of Michigan on 100 buses. Since the election, she said "People are showing up at any kind of activist meeting because they want to do something and they don't know what to do."
"None of us are single issue voters," Dingell said. "We want to make sure Americans have quality, affordable health care, funding for Planned Parenthood and that women are treated fairly in the work place."
She said she believes Trump is "a man who listens to how people feel."
"I think he's a smart man, and I think he will see a movement. He will see women scared about what's going to happen to the country," Dingell said.
The march has evolved organically from a post-election call to action on Facebook to an organized effort that will include a roster of high-wattage activists and attendees including feminist Gloria Steinem, singer Katy Perry, actors America Ferrera, Ashley Judd and Scarlett Johansson.
Leaders and activists from hundreds of left-leaning groups are joining the march, including the NAACP, Planned Parenthood, the American Federation of Teachers, as well as pro-immigrant and pro-environment groups.
Margaret Huang, the executive director of Amnesty International USA, which is co-sponsoring the march, said the group's members were concerned about talk of a Muslim registry and Trump's "willingness to use policies to exclude particular communities."
"These sorts of rhetorical commitments that (Trump) made on the campaign trail cannot become policy," she said.
Mother and daughter Deborah and Maeve Kelly of New Jersey decided to attend the march after being deeply frustrated by the results of the November election. They left the Alice Paul Institute in Mount Laurel, New Jersey, at 6 a.m. ET on Saturday, and their group plans to return to New Jersey later in the evening.
Deborah Kelly, 61 of Chesterfield Township, New Jersey, said she was inspired to march after being stunned by the number of women who voted for Trump in November.
"I didn't feel like women were voting in their own interests," she said in a telephone interview before Saturday's event. "This march was a way to demonstrate to the public that there is a large group of women out there who feel that the rights and progress made over the last decade are really threatened and could be eroded."
She encouraged her daughter to attend with her as part of the show of force by all generations: "We have to be very vigilant," Kelly said. "This is almost a symbolic passing of the torch to the younger generation, who have to be active to protect the rights that we have fought for."
Maeve Kelly, 25 of Lambertville, New Jersey, said she didn't want American voters to forget about the comments Trump has made over the years judging women by their looks and their weight.
"That's just something that really angers me, and I don't think it has any place in my world," she said in an interview. "It feels like everything we have worked toward, and all that suffragettes worked toward -- so we could vote and be successful -- is threatened now."
The march, she said, is "mostly just a message of solidarity."
"There are so many people traveling from all over the country to show that we are going to stand together and not let the President of our country bully us or make us feel like we don't belong," she said. "It's really just taking a stand for women's rights."
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