Christopher Wray was supposed to bring a new candor and credibility to the FBI after the James Comey debacle, but the country is still waiting. The director’s testimony Thursday to the House Judiciary Committee suggests he has joined the Justice Department effort to stop the public from learning about the bureau’s role in the 2016 election.

Judiciary Chairman Bob Goodlatte invited Mr. Wray to answer the multiplying questions about the bureau’s 2016 political interference. This includes the role that the Steele dossier—opposition...