There is much for conservatives to celebrate about the death of the Liberals’ legislative agenda, which is one of the chief effects of proroguing Parliament: Every government bill in progress “cease(s) to exist,” as the House of Commons’ procedural website puts it, and would in theory have to start at square one once Parliament returns on March 24. In practice, of course, the only real order of business then will be bringing down the government. It is an ex-legislative agenda.