Some parts of Democratic Twitter go nuts when it is pointed out that President Biden's 100-day job approval rating is the third-lowest of any president since World War II. (Only Donald Trump and Gerald Ford were lower.) All that matters to the most partisan Democrats, apparently, is that Biden's approval rating is higher than Trump's.But why is Biden's 100-day rating below so many other presidents? A chart of presidential 100-day ratings compiled by pollster Bill McInturff -- he is the Republican half of the team that polls for the Wall Street Journal and NBC News -- shows that polarization between...