The British Parliament has not yet returned from its summer break but we are already in a bitter constitutional battle, with the prime minister pitted against the speaker of the House of Commons and the opposition parties. Boris Johnson’s decision to prorogue parliament is a deliberate attempt to raise the stakes. He wants to deny time to any effort by Members of Parliament to pass a law forcing him to request a Brexit extension. His message to them: bring me down or let me get on with Brexit.
When…