Republican Sen. Ben Sasse is initiating an inquiry into the intelligence community’s refusal to conduct a routine damage assessment of the classified information exposed by Hillary Clinton’s unsecured email system.

“As a member of the Senate Homeland Security and Governmental Affairs Committee, I take these unauthorized disclosures of sensitive and classified material very seriously and I am concerned about our nation’s ability to secure its interests and its secrets,” Nebraska’s junior senator wrote in a Thursday letter to the Office of the Director of National Intelligence.