Democracies assume accurate knowledge by the populace, but the human attraction to fake
and untrustworthy news poses a serious problem for healthy democratic functioning. We
articulate why and how identification with political parties–known as partisanship–can bias
information processing in the human brain. There is extensive evidence that people engage
in motivated political reasoning, but recent research suggests that partisanship can alter
memory, implicit evaluation, and even perceptual judgments. We propose an identity-based …