OPINION: Liz Peek: Trump self-destructing? The one big bucket of ice water on Dems' smug assurance about the president

Democrats are reaping what they have sown. What began as a trickle of cautionary advice has become a torrent, as Rhode Island Gov. Gina Raimondo, columnists Thomas Friedman and Frank Bruni, former Iowa Gov. Tom Vilsack, BET Founder Robert Johnson, former Starbucks CEO Howard Schultz and so many others warn Democrats that their far-left lunge is likely to reelect President Trump.

A recent piece in the New York Times analyzing the president’s polling in several important states brings home the high cost of Democratic extremism. Given Trump’s standing in the...