Alongside the social upheaval in American streets, a significant movement has percolated in the halls of our government's most rigid institution.

A fundamental tension between executive authority and allegiance to the Constitution has prompted unprecedented soul-searching within the military, traditionally a stalwart for conservative values.

It began with the president's notorious Bible photo-up, preceded by a military crackdown north

of the White House, clearing protesters from Lafayette Square.

Several days later, General Mark Mealy, chairman of the Joint Chiefs of Staff, publicly renounced his role in enabling the

June 1st incident.

As many of you saw the result of the photograph of me at Lafayette Square last week, I should

not have been there. My presence in that moment and in that environment created a perception

of the military involved in domestic politics.

It was a mistake.

Secretary of Defense Mark Esper also renounced the photo op and undercut the president's

threat against protesters.

Saying that he did not support the use of the Interaction Act to put down civilian,

peaceful protests that were taking place across the

country shortly after that photo op as well at St. John's Church.

That's right. And we know that the president was really unhappy with Secretary Esper over

those comments, the public nature of them.

And just before Trump's commencement speech at West Point, hundreds of alumni of the Military Academy signed an open letter urging new West Point graduates to approach future orders from the president, especially those concerning military force against civilians, with caution.

According to Slate writer Fred Kaplan, such public insubordination from the general class down to the rank and file is highly unusual.

Fred, welcome back to the show.

Thanks.

Good to be there.

...