: Supporters of LGBT rights marched and rallied in the nation's capital and dozens of other US cities on Sunday, celebrating gains but angry over threats posed by the administration of President Donald Trump.

The centerpiece event, the Equality March in Washington, was endorsed by virtually every major national advocacy group working on behalf of lesbian, gay, bisexual and transgender Americans.

Activists have been embittered by the Trump administration's rollback of federal guidance advising school districts to let transgender students use the bathrooms and locker rooms of their choice.

They also complain that Trump, who campaigned as a potential ally of gays and lesbians, has stocked his administration with foes of LGBT rights, including Vice President Mike Pence, Attorney General Jeff Sessions, and Health and Human Services Secretary Tom Price.

Throngs of marchers, many thousands strong, paraded past the White House and toward the Capitol, trailing behind a giant rainbow flag near the head of the procession.

"We're here, we're queer, get that Cheeto out of here," was among the chants directed at Trump.

For the LGBT community nationwide, it's an emotional time. Monday is the anniversary of the mass shooting a year ago in Orlando, Florida, that killed 49 people — mostly Latinos — at Pulse, a gay nightclub.

Among the marchers in Washington was Gil Mendez, a Puerto Rican native who traveled with his partner all the way from San Francisco to join the parade. He carried a sign that included the names of all the Pulse victims.

"The attack on Pulse really struck me hard," he said. "It made the connection between the physical violence of guns and the political attacks on our community."

Also marching, and singing freedom songs and patriotic songs along the way, were scores of members of gay choruses from various cities.

"It's an opportunity to tell everyone we're still here, and we're not going away at all," said Gregory Elfers of Teaneck, New Jersey, who was with a contingent from the New York City Gay Men's Chorus.

"We have to be heard — we have to be sure we're not trampled on," said L. Owen Taggart of Washington's Gay Men's Chorus.

The roughly 100 marches and rallies across the US included the first-ever gay pride parade in Grosse Pointe, a prosperous Detroit suburb. It began at Grosse Pointe South High School to emphasize support for teens who are gay or transgender.

Two 15-year-old marchers, Jessica Dodge and Shekinah Aho, held hands and wore shirts that said, "Make America Gay Again."

The Los Angeles pride parade was renamed the ResistMarch, and tens of thousands turned out in Hollywood, some carrying rainbow flags or signs reading "Love Trumps Hate." Speakers included Mayor Eric Garcetti, US Representative Adam Schiff, Maxine Waters and Nancy Pelosi, and RuPaul, the host of "RuPaul's Drag Race."

Waters led the crowd in a chant of "Impeach 45."

"We're going to take our country back from him," she said. "I know that you have the strength. I know that you have the courage. And I know that each of you understand you have the power."

Back in Washington, the activist leaders on hand included Sarah Kate Ellis, president of GLAAD, which monitors media coverage of the LGBT community.

She noted that Trump, breaking from the practice of Barack Obama, has declined to issue a proclamation in honor of Pride Month, and that the Trump administration has deleted questions about sexual orientation from planned federal surveys.

"If you look at their prioritization, we're really low on it," she said. "There absolutely is a resistance aspect to this march."