Sen. James Lankford, R-Okla., has written a letter to the secretary of the Education Department decrying the department’s federal overreach when it comes to bullying, harassment and sexual violence.

Lankford, who chairs the Homeland Security Subcommittee on Regulatory Affairs, has taken specific issue with the Education Department’s rules regarding how schools adjudicate these issues. The department has issued multiple “Dear Colleague” letters imposing new rules, and with that, costs, on schools across the country without congressional approval or even a comment period.