Independents are the key to Trump's impeachment fallout

It sounds simple, sure, but the marginal groups are the ones who decide electoral fates

Donald Trump won independent voters by four percentage points in the 2016 election, according to the exit poll. But the group has had a negative view of his job approval ever since he took office. With impeachment likely, but conviction not (at least for now), this fact ought to be shaking the president’s re-election committee to its core.

I am prompted …