To some degree every White House Press Secretary is shilling for their President, but Josh Earnest has gone the extra mile. Where some might be willing to dodge questions and lie, Earnest is willing to write angry old man letters to the editor op-eds in which he both denies obfuscation AND demands you give his administration props for its record-setting level of transparency.
I'll say this for the guy: He has a job to do, and he does it with gusto.
Oh sure, that job is shilling for the least transparent, most shameless administration in history, but he's one heck of a shill.