If you’re a close reader of political news, the website longroom.com might very well have come to your attention in the last week. The site hosts a polling page that purports to “remove the bias in the polls,” which mostly has the effect of showing Donald Trump up in the presidential race, though most polls show Hillary Clinton leading him by solid single-digit margins. If you’ve been a bit distracted by the Olympics and don’t have a clue what LongRoom is, no harm, no foul. In fact, that’s probably for the better, because the site’s methodology is askew and its...