If President Donald Trump wins re-election in 2020, there will not be lots of people — unlike in 2016 — gasping with surprise at the outcome. But there are plenty of people who remain utterly bewildered by the prospect.
How after everything — abysmal polls, the 2018 midterm debacle, this week’s impeachment — is a second-term even a possibility? The belief that the usual rules of politics simply do not apply to this president — whether due to political dark arts or some kind of...