Boris Johnson, Britain’s prime minister, narrowly survived a no-confidence vote last night. As he limps on, the informal contest to succeed him will intensify, as will questions about the Conservative Party’s direction. San Francisco’s progressive district attorney faces a recall election today, in a vote with broader implications for the future of criminal-justice reform in America. And why Ukraine’s army relies on century-old machineguns. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer