text: Piltz talks about what he believes ExxonMobiil should do, and he's got every right to do so. But there is a big difference in his doing so and two U.S. Senators doing the same: He has no power to subpoena company executives into hearings or impose taxes or regulations. Yes, the Senators have free speech rights to say whatever they want, but there is a difference between their personal opinions and those they convey on behalf of their office.