“You recited that same oath on July 23, 2019, when you were sworn in as Secretary of Defense. On Monday, June 1, 2020, I believe that you violated that oath,” Miller wrote.
“You may not have been able to stop President Trump from directing this appalling use of force, but you could have chosen to oppose it. Instead, you visibly supported it,” Miller added.
After they were cleared, President Donald Trump and an entourage of administration officials and security personnel walked to nearby St. John’s Episcopal Church, a historic house of worship, where the President posed for photos, some of which included Esper and several other top officials. The exterior of the church had been defaced during protests outside the White House on Sunday and there had been a small fire in the parish house basement, but church leaders said in a statement that the structure was largely “untouched.”
“I didn’t know where I was going,” Esper told the network. “I wanted to see how much damage actually happened.”
The secretary also addressed the widespread protests in an internal department-wide memo on Tuesday, saying, “I, like you, am steadfast in my belief that Americans who are frustrated, angry, and seeking to be heard must be ensured that opportunity.”
The Defense Advisory Board, which was established in the 1950s during the height of the Cold War, comprises nearly 50 retired senior military, government, and industry leaders, and has advised the Pentagon on issues such as acquisition, cyber and communication technology, and weapons of mass destruction.
The Pentagon did not immediately return a request for comment on Miller’s resignation.
This story has been updated with additional developments Tuesday.
CNN’s Devan Cole contributed to this report.