WASHINGTON — More than 1,000 people gathered near the Washington Monument on Saturday to rally at the March for Truth, calling for an independent investigation into alleged collusion between Russia and President Trump’s 2016 campaign.

Organizers also used the occasion to celebrate the “resistance” movement against the Trump administration, and implored the crowd to stay involved for the long haul.

“We gotta keep up the fight, that’s all there is to it,” said Jon Lovett, a former Obama speechwriter and popular podcast host, who spoke at the D.C. rally.

Thousands more protested in more than 100 cities across the country, including New York, Pittsburgh and Chicago.

The chants at the D.C. march were clever and cumbersome, taking wonky and specific aim at what the protesters believe have been White House attempts to cover up its connections with the Russian government.

“The Rosenstein memo was phony, we want testimony from Comey!” the protesters chanted, criticizing Trump’s decision to fire the director of the FBI after receiving a recommendation from Deputy Attorney General Rod Rosenstein.

“That firing was abrupt, what are you covering up?” another chant went.

Most people at the March for Truth in Washington traveled from D.C. and the surrounding suburbs, but a handful made an overnight trek from farther states.

“I wanted to be part of the crowd, to make it larger and make a statement,” said Odell Buggs, a 53-year-old small-business owner who traveled from Rochester, New York, with her two sisters. She also drove to nation’s capital for the Women’s March, Tax March and Climate March.