Thursday’s British general election is a major test of popular democracy versus establishment power.

Since the June 2016 referendum, in which Britons voted to leave the European Union, popular will has been restrained. While hardliner Brexit supporters share some of the blame here in pushing a Brexit that would end all EU trade links, the major obstacle to Brexit’s fulfillment has been Parliament — specifically, politicians who believe that Brexit was and is a terrible mistake. Supported by various lawsuits, they have prevented Brexit from becoming real. Given a second chance, they say, leave voters would correct their mistake and keep Britain in the EU.