With endorsements from five previous FDA Commissioners and a Republican Senate deciding his fate, Stephen Hahn, M.D., is certain to become the next Commissioner of the U.S. Food and Drug Administration.He's qualified, but most FDA heads have been(1). He also understands politics, and that is always part of FDA because a Commissioner has to let career scientists do their jobs while navigating demands from both the White House and Congress, which can often be politically motivated. And he s a lung cancer doctor, so he understands better than most what really causes lung cancer (smoking) and what is hype promoted by pharmaceutical companies and other groups who have tremendous influence inside organizations like the American Medical Association.