“There is not a damn thing that has prevented Gowdy from getting a subpeona for that server...”
And a subpeona must be enforced by the friggin’ EXECUTIVE BRANCH. What the hell don’t you understand about that? Gowdy doesn’t have any enforcement mechanism - US marshals - to compel or arrest individuals who ignore subpeonas.
And by the way, who is going to “enforce” his email subpeona?