Predicting turnout in a presidential election.(Opinion)

With Election Day only two months away, many campaigns are grappling with two questions. Which voters will show up on Nov, 2? And which voters should be the targets of get-out-the-vote (GOTV) activities?

This is the presidential election. Turnout is higher than in any other political contest. That higher turnout means that a high percentage of voters are almost certain to vote and need little encouragement to show up at the polls. And among the rest of the electorate, everyone is a good prospect to cast a ballot.

Who Will Vote?

Of all of the targ