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It is a proudly proclaimed tenet of U.S. conservatism (Republicans) that liberty includes the freedom of bias and to promote bias for personal, business and political ends. This includes freedom of bigoted policy and exclusion of others on racist principle. There's a hyper-Hegelian ideological gesture made by conservatives that intolerance of their bigotry is a form of discrimination against white Christians which endangers their privilege and majority. This gesture generates a surprisingly high degree political resonance in the U.S.

As to the matter of structural bias in the 4th estate relating establishment political objectives and policy, the national press is a complex instrument of great power, so of course it will play bias to the hilt, and occasionally its management will become roiled by "controversy" over the positions of the levers of machinery of opinion.