The Justice Department’s Office of Legal Counsel signed off on Matthew Whitaker’s appointment as acting attorney general Wednesday, issuing a public opinion that is unlikely to quell the debate over the constitutionality of his installation by President Donald Trump.

The memo comes less than a week after Whitaker stepped into the role, taking the place of Jeff Sessions who resigned from his role as Attorney General at the White House’s request. Trump’s designation of Whitaker as Acting Attorney General—he previously served as Sessions’ chief of staff—has stirred debate over whether his placement required U.S. Senate confirmation.