I work for the President but like-minded colleagues and I have vowed to thwart parts of his agenda and his worst inclinations

President Trump is facing a test to his presidency unlike any faced by a modern American leader.

It’s not just that the special counsel looms large. Or that the country is bitterly divided over Mr. Trump’s leadership. Or even that his party might well lose the House to an opposition hellbent on his downfall.

The dilemma — which he does not fully grasp — is that many of the senior officials in his own administration are working diligently from within to frustrate parts of his agenda and his worst inclinations.

I would know. I am one of them.

To be clear, ours is not the popular “resistance” of the left. We want the administration to succeed and think that many of its policies have already made America safer and more prosperous.