Last fall, the American National Election Study asked a representative sample of Americans four factual-knowledge questions about government: which party controlled the House and the Senate, how long a Senator’s term lasts, and which federal program costs the most. The mean respondent got just under two (1.94) of the four items right.
I thought some comparisons would be interesting. As shown in the chart below, Clinton voters scored a bit higher than Trump voters–but not by a mile. Political knowledge of this type correlated somewhat with understanding climate change, and a lot with following political news and planning to vote. Obama and Romney voters had indistinguishable levels of political knowledge. Liberals performed a bit better than conservatives, and both knew more than moderates. Knowing more about government correlated with trusting it a bit less.