In my latest piece for Bloomberg Opinion, I explore how the retiring Anthony Fauci—who started off as a universally admired voice in the early weeks of the COVID pandemic—became a partisan figure in American politics. The root of this evolution lies in the two parties' differing attitudes towards experts who draw on their credentials to assert authority over policymaking; Democrats are inclined to defer to "the science," while Republicans are likely to rebel against what they see as liberalism in the guise of objectivity.