Britain’s political system is in crisis after Brexit. Shortly after voters decided that Britain should leave the European Union, David Cameron, the prime minister and Conservative Party leader, announced his resignation. This led to a short but vicious leadership contest, which left the ambiguous “Remain” supporter Theresa May as prime minister by default. The insecurity ...

The United Kingdom’s historic decision to leave the EU has stunned Brussels and sent shock waves through Europe. The Scottish government has threatened to hold a second referendum on independence, jeopardizing the kingdom’s unity. And in Ireland, the vote threatens to derail a fragile peace process and undermine a recent economic recovery. Over the past ...