Tourists are seen near the White House in Washington, D.C., the United States, May 14, 2021. (Xinhua/Liu Jie)

A US federal judge on Monday dismissed most of the claims filed in a case suing former president Donald Trump after security officers forcefully cleared peaceful demonstrators outside the White House in the summer of 2020.

The American Civil Liberties Union and other US civil rights groups accused the then-president and top officials in June 2020 of violating the constitutional rights of Black Lives Matters campaigners and individual protesters.

US District Judge Dabney L. Friedrich of Washington dismissed the majority of the claims filed against Trump, explaining in a 51-page opinion that accusations that the ex-president and several of his top officials had conspired to clear a path for a photo opportunity were too speculative.

"These allegations, taken as true, do not show sufficient 'events, conversations, or documents indicating an agreement or meeting of the minds' amongst the defendants to violate [plaintiffs'] rights based on [their] membership in a protected class," she wrote.

She also dismissed the plaintiffs' push for a court order that would require the government to change its use-of-force practices against protesters.

Friedrich, a 2017 Trump appointee, did allow litigation to go forward challenging federal restrictions on protests at Lafayette Square, directly across from the White House, as well as against local police agencies that supported the operation.

On June 1, protesters angered by the murder of George Floyd, a black man, by a white Minnesota police officer gathered in Lafayette Square, which faces the White House and became the focus of anti-racism protests in Washington.

St John's Episcopal church, which is across the street from Lafayette Park, had been defaced with graffiti and damaged in a fire during demonstrations the night before. 

Law enforcement officers forced protestors back with pepper balls and smoke bombs before Trump walked to the church for a photo op. ACLU of the District of Columbia legal director slammed the judge's decision.