Snippets from his resignation letter:
“I am grateful to you for the opportunity to serve; for the courtesy and humor you often display in our personal conversations; and for the goals you set in your inaugural address: patriotism, unity, safety, education and prosperity,”
“Our nation is safer, our elections are more secure and our citizens are better informed about covert foreign efforts and schemes to commit fraud, steal intellectual property, and launch cyberattacks,”
“Political considerations may influence policy choices, but neutral principals must drive decisions about individual cases,”
Maybe Barr found something he didn't like...