Did the GOP Peak Too Soon?

You know why it’s a cliche to say “X amount of time is a lifetime in politics”? Just look at how August is shaping up.

Just a few weeks ago, buzz over the coming “red tsunami” in the midterms was common. All of a sudden that sounds more like wishful thinking.

The change has come so suddenly, polls are still lagging behind what hipsters might call a political “vibe shift.” Yet even some long-term trends support the idea the GOP peaked too soon. In January, Republicans led by 7 percentage...