According to a court ruling issued Friday, FBI personnel routinely broke their own guidelines when searching a massive reservoir of foreign intelligence for material relevant to the January 6 insurgency and racial justice marches in 2020.

Officials with the FBI reported thousands of infractions which included inappropriate searches of congressional campaign contributors, predated a series of remedial procedures that began in the summer of 2021 and continued last year.

However, the issues may impede the FBI's and Justice Department's efforts to get congressional approval for a warrantless monitoring program that law enforcement officials believe is necessary to combat terrorism, espionage, and international cybercrime.

The infractions were outlined in a secret court decision issued last year by the FISA court, which has legal authority over the US government's snooping activities. In the spirit of openness, the Office of the Director of National Intelligence issued a heavily redacted version on Friday.

Patrick Toomey, deputy director of the ACLU’s National Security Project, stated that “Today’s disclosures underscore the need for Congress to rein in the FBI’s egregious abuses of this law, including warrantless searches using the names of people who donated to a congressional candidate."

Read more: Republicans issue 1,000-page report saying FBI is 'rotten at its core'

“These unlawful searches undermine our core constitutional rights and threaten the bedrock of our democracy. It’s clear the FBI can’t be left to police itself.”

Improper queries of foreign intelligence material gathered under section 702 of the Foreign Intelligence Surveillance Act, which allows the government to collect communications of targeted foreigners outside the United States, are at issue.

This initiative, which is slated to expire at the end of the year, provides an intelligence database for US agencies to search. FBI searches must serve a foreign intelligence purpose or seek evidence of a crime. However, congressional opponents of the program have long expressed worry over what they call unwarranted searches of the database for information on Americans, as well as broader worries about surveillance abuses.

Such criticism has allied hardline leftist civil rights advocates with Donald Trump fans, who have seized on FBI surveillance missteps during an investigation into his 2016 campaign. The problem has risen as the Republican-led House has focused on the FBI, forming a committee to look into the "weaponization" of government.

The FBI's own guidelines were not followed in many cases revealed on Friday. The April 2022 order, for example, describes how the FBI queried the Section 702 repository using the identity of someone suspected of being at the Capitol during the January 6  disturbance. The material was gathered despite the fact that it had no "analytical, investigative, or evidentiary purpose," according to the ruling.

According to the court order, an FBI analyst ran 13 queries on people suspected of being involved in the Capitol riot to see if they had any foreign ties, but the Justice Department later determined that the searches were unlikely to turn up any foreign intelligence information or evidence of a crime.

Other breaches occurred in June 2020, when FBI employees conducted searches relating to more than 100 people detained in connection with civil unrest and racial justice rallies in the US in the preceding weeks. According to the ruling, the FBI maintained that the inquiries were likely to yield foreign information, though the reasons for that conclusion are mainly redacted.

Furthermore, the FBI did a batch query for 19,000 contributors to an undisclosed congressional campaign. The justice department stated that just “eight identifiers used in the query had sufficient ties to foreign influence activities to comply with the querying standard” despite the fact that an analyst conducting the search expressed worry that the campaign was a target of foreign influence.

Officials said the instance involved a failed candidate who is not a serving member of Congress and is unconnected to an incident disclosed in March by Illinois Republican congressman Darin LaHood, who accused the FBI of incorrectly looking for his name in foreign surveillance data.

Senior FBI officials, speaking to reporters on the condition of anonymity due to federal ground rules, blamed the majority of the infractions on misunderstanding among the staff and a lack of shared knowledge of the querying criteria.

They said that the FBI has made substantial improvements since then, including requiring training and redesigning its computer system, so that FBI agents must now input a rationale for the search in their own words rather than relying on a drop-down menu with pre-populated alternatives.

According to one of the officials, an internal evaluation of a representative sample of searches revealed that compliance climbed from 82% before the improvements were introduced to 96% thereafter.