Attorney General Jeff Sessions disappointed several leading figures in the Republican Party when, instead of announcing a second special counsel to investigate alleged wrongdoing in the Justice Department and FBI, he revealed Utah’s top federal prosecutor was looking into the matter.

In a letter to Republican chairmen made public Thursday afternoon, Sessions revealed John Huber, the lead U.S. attorney and top federal law enforcement officer in Utah, was investigating allegations of government misconduct and that upon his probe’s conclusion would determine the need for a special counsel — who would have broader prosecutorial powers.