The Wall Street Journal calls Mark Hayes a lobbyist for Humana, an insurance company that makes much of it's revenue off of Medicare. Bloomberg calls him a lobbyist for Greenberg Traurig. He's also a consultant for an investment research firm, Height Securities. The parties' intertwined relationships are starting to sound like a Mississippi family tree.
Greenberg Traurig represented both Height and Humana. The Journal published an email from an analyst at Height to a Humana lobbyist, which was met with an "out of office" email auto responder, that stated "You guys seem to have done everything you can. I wish you the best with rates this evening."