Today, as Britain marks the tenth anniversary of the historic Brexit referendum, the conventional wisdom among the chatterati is that the vote to leave the EU was a terrible, cataclysmic mistake.

As the sixth prime minister since the historic vote calls it quits, most Britons agree it’s been an epic disaster. But in the next election, things may get even worse.

Today, as Britain marks the tenth anniversary of the historic Brexit referendum, the conventional wisdom among the chatterati is that the vote to leave the EU was a terrible,…