If you’re like me, the worse Trump does, the better you feel about the country’s future. So despite it being gray outside, I woke up Saturday a bit more bullish about things. But thanks to John Cassidy of The New Yorker for the proverbial, political science slap in the face:

“Another argument you hear from Trump supporters, and even from some nervous Democrats, is that the polls might be understating his chances. That could be the case if pollsters are systematically underestimating the likely turnout among groups who like Trump, or they are systematically overestimating the likely turnout among groups supportive of Clinton, or both. It’s also conceivable that some Trump voters are reluctant to reveal their support for him to pollsters. These sorts of things can happen. Look at Brexit. Most of the polls in Britain got that result wrong, partly because their assumptions about turnout turned out to be mistaken.”