Want the latest climate news in your inbox? You can sign up here to receive Climate Fwd:, our new email newsletter.

WASHINGTON — An internal assessment of threats aimed at Scott Pruitt, the administrator of the Environmental Protection Agency, undercuts claims made by Mr. Pruitt’s security team to justify millions of dollars in security expenditures, according to an internal document obtained by a Senate Democrat.

Senator Sheldon Whitehouse of Rhode Island wrote in a letter on Tuesday to John Barrasso, chairman of the Senate Committee on Environment and Public Works, that the E.P.A.’s Homeland Security Intelligence Team reviewed an earlier memo in February and found no specific credible threats to the administrator.

The earlier memo, from October, was created by Mr. Pruitt’s protective security detail, led by Pasquale Perrotta, who is known as Nino. It was used to justify much of Mr. Pruitt’s large security detail and first-class travel.