Lest I mislead you, I do not subscribe to the belief that a president should be judged by the stock market. Or that either Mr. Obama or Mr. Trump was the principal driver in the rise of the stock market during their terms. But some people do, especially, it seems, the Trump acolytes who want others to believe Mr. Trump is a good president as proven by rising stock values. The graph undercuts such silly ideas, although, to be honest, I don’t expect facts to have any bearing on the foolish beliefs some of my fellow Americans tout. We are, after all, living in the post-truth era. It’s the narrative that counts. Facts be damned.