Federal employees who expose government waste, fraud and abuse are having a tough time in the “most transparent administration in history.”

Robert MacLean, a former air marshal, told a House subcommittee Tuesday that managers at the Transportation Security Administration “thumb their nose” at whistleblower protection laws.

MacLean, who complained that air marshals were improperly grounded by the TSA, is taking his termination to the U.S. Supreme Court after losing a series of lopsided proceedings at the agency. He said the TSA branded him “an organizational terrorist.”