The massive error in the much publicized "Correlation not causation: the relationship between personality traits and political ideologies."

That article in American Journal of Political Science that everyone was talking about — because it made conservatives seem mentally disturbed — had to run a correction admitting they'd botched the data and what they'd presented as correlating with conservatism actually correlated to liberalism. Power Line has the details and ends with this paragraph:

In other words, if this study hadn’t come out conforming to the liberal narrative and sliming conservatives, it wouldn’t have attracted much notice. By the way, your tax dollars paid for this essential social science research. A note at the end says, “The data for this article were collected with the financial support of the National Institute of Health.” And people wonder why Republicans in Congress want to cut off federal funding for social science research. As an alternative, I suggest redirecting federal social science funds to Retraction Watch.