The New York Times has a helpful post for those trying to figure out the back story behind Billy Tauzin’s resignation as head of PhRMA. Liberals have long been uncomfortable with the deal he cut limiting his industry’s exposure in the health reform to $80 billion — they wanted more. Conservatives were unhappy that PhRMA signed the deal to back President Obama’s health plan and even ran ads in support. Tauzin could — and did — survive this. But the pharmaceutical CEOs, the people who signed his paychecks, apparently lost confidence in him for placing such a big bet on an inevitable health package that has turned out to be not so inevitable, and that he could not survive.