Defense Department officials were pressured to skew their reports on the military campaign against the Islamic State, making it appear more successful than “was warranted by facts on the ground,” and “consistently more positive than analysis produced by other elements of the Intelligence Community,” according to a report by a House Republican task force released on Thursday.

The report, issued by a joint task force on the U.S. Central Command, largely backed up the allegations of a “whistleblower” who claimed that analysts at the agency were pressured to “manipulate” their work after management changes in 2014, the report said. A Daily Beast story published in September cited 50 intelligence analysts who said their reports were altered to offer a rosier picture of the fight against ISIS in Iraq and Syria.

The findings were almost immediately challenged by a competing panel of Democrats, which issued its own report Thursday.

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Republicans on the task force, led by Reps. Ken Calvert, Mike Pompeo, and Brad Wenstrup, issued statements saying that the problems they had uncovered reached to the highest ranks of Central Command, an arm of the Department of Defense that oversees American military operations in the Middle East.