Grassley, a ranking member of the Senate Judiciary Committee and one of the key people on Capitol Hill who pushed for an investigation of the Obama administration’s scandalous Operation Fast & Furious more than a decade ago, focused his four-page letter on so-called “ghost guns,” and the nomination of Steven Dettelbach to head the Bureau of Alcohol, Tobacco, Firearms and Explosives. The Iowa Republican says in his letter, “I intend to fully review Mr. Dettelbach’s record, but even a cursory review of his statements about gun ownership demonstrate a lack of awareness of the circumstances surrounding legal gun acquisition, or outright favoritism of expansive gun control.”