Eric Holder, US attorney general from 2009 to 2015, writes an editorial in the Washington Post with the title: “James Comey is a good man, but he made a serious mistake.”
He writes, “I am deeply concerned about FBI Director James B. Comey’s decision to write a vague letter to Congress about emails potentially connected to a matter of public, and political, interest. That decision was incorrect. It violated long-standing Justice Department policies and tradition. … Director Comey broke with these fundamental principles. I fear he has unintentionally and negatively affected public trust in both the Justice Department and the FBI. And he has allowed — again without improper motive — misinformation to be spread by partisans with less pure intentions.“
Holder continues, “This controversy has its roots in the director’s July  decision to hold a news conference announcing his recommendation that the Justice Department bring no charges against Hillary Clinton.” He says, given that Attorney General Loretta Lynch recused herself from the case, instead of having Comey “publicly share his professional recommendation, as well as his personal opinions” about the case in a “a stunning breach of protocol,” Deputy Attorney General Sally Yates could have announced the final decision of the department, without Comey’s extensive public commentary.
Holder concludes, “I served with Jim Comey and I know him well. This is a very difficult piece for me to write. He is a man of integrity and honor. I respect him. But good men make mistakes. In this instance, he has committed a serious error with potentially severe implications.” (The Washington Post, 10/31/2016)