In another life, Frum might have been a Soviet-era commissar, grimly ticking off the ideological deviations of his victims, and stonily informing them that they would soon be taking a one-way trip to Siberia. In his present incarnation, however, after being fired from his White House position, the author of Dead Right, a polemical narrative about the evolution of the conservative movement, and other books, has settled into his role as chief political commissar of the "mainstream" conservative movement