Is the GOP Facing a Midterm Disaster?

After the victory of Donald Trump in 2016, the GOP held the Senate and House, two-thirds of the governorships, and 1,000 more state legislators than they had on the day Barack Obama took office.

“The Republican Party has not been this dominant in 90 years,” went the exultant claim.

A year later, Republicans lost the governorship of Virginia and almost lost the legislature.

Came then the loss of a U.S. Senate seat in ruby-red Alabama.

Tuesday, Democrats captured a House seat in a Pennsylvania...