France is a republic created by a general who wanted to be a monarch. So, more than 65 years ago, Charles de Gaulle designed a presidency with vast powers to name governments, call elections, pass laws without a vote and launch nuclear missiles. Like powerful monarchies of the past, its politics are irregularly punctuated by popular revolts. A week ago, the latest revolt seemed about to topple — or at least severely wound — the sitting president, Emmanuel Macron, who believes the French regret beheading their last king and want to be ruled by a Jupiter-like leader. The extreme-right National...