In the latest salvo in the legal and public relations battle between Hunter Biden and his pursuers, Mr. Biden fils’ attorneys have filed their second ethics complaint against Congresswoman Marjorie Taylor Greene after she displayed obscene photos of the president’s son during Wednesday’s House hearing probing the Department of Justice’s investigation of Mr. Biden.

Mr. Biden’s lead attorney, Abbe Lowell, a Washington power lawyer, said in a Friday letter to the Office of Congressional Ethics that Ms. Greene “has lowered herself, and by extension the entire House of Representatives, to a new level of abhorrent behavior that blatantly violates House Ethics rules and standards of official conduct.”