The 7 key factors defining the 2018 midterms

It will be a nationwide referendum on the Trump presidency. But that will mean very different things depending on what part of the nation we’re talking about.

President Donald Trump is by far the biggest force driving politics in 2018. Trump has unleashed a fierce opposition yet has inspired loyalties that may be equally strong, setting up a series of clashes for control of Congress and 36 governorships in November’s midterm elections.

Leave aside talk of “waves” and “firewalls.” Trump is more like an earthquake. His impact will crash unequally across the nation’s political geography, motivating voters in multiple directions.

In 100 days, a divided country will have its say. Here’s a glimpse at seven big factors that could determine the outcome of the midterms: CONT.

Rick Klein, ABC News