Bingo! He strayed from the issue and tried to take it personal. The fact remains whether Fox was on or off the medication or whether this was the "take" that showed him at his worst, it needed to remain in the context of the commentary Fox made in the commercials. If Fox was a burn victim and wore extensive comestic devices to cover that and took them off for the commercial to show his burns to support stem cell scar burn recovery, it would be the same. The scars are there not matter what. The cosmetics, like the medication mask the real problem. Rush may win in the end, but my guess is he's hurt himself by taking it personal.
Fox made it personal, not Rush.