It was only 15 years ago that Congress cut off federal funding for the Centers for Disease Control's gun research. Top CDC officials such as Patrick O'Carroll, M.D., had said things like, 'We're going to systematically build a case that owning firearms causes deaths. We're doing the most we can do, given the political realities.'" There is reason to fear that the CDC would once again politicize their research or expand exclusionary mental illness to prohibit firearm ownership for millions of Americans.