Do you seriously believe there is a dearth of left-wing mainstream media outlets? And the problem with the politicization of science is not a right-vs-left issue. The left has its own bag of anti-science positions (e.g., blank slatism, anti-GMO, implicit bias, etc).
EDIT: Do downvoters question that the majority of prominent news outlets are left-wing or that the left has anti-science positions?