In France, it has been a frenzied fall. First, the government was toppled by an irate Parliament. Then, in a panic, President Emmanuel Macron tapped a protégé, Sébastien Lecornu, to be prime minister; he resigned less than a month later. Confusion raged. Today things are a little calmer. Mr. Lecornu, returned to the office he had so hurriedly vacated, has managed to bring some stability by making concessions to rivals. He might even succeed in passing a budget. But he is not out of the woods yet.