Democrats have a 'smug' problem

The day after the election, an NBC News chart circulated on Instagram that highlighting exit poll data showing that, roughly, the more education you had, the more likely you were to vote for Vice President Kamala Harris over President-elect Donald Trump. Some liberals used the occasion to look down upon the icky dummies who were too stupid to know they shouldn't vote for Trump.

Yet Trump’s victory was both definitive and diverse. He won broad swaths of the electorate, making significant...