The Schengen system of free movement could be suspended for two years under emergency measures to be discussed by European ministers on Monday, as the French Prime Minister warned the crisis could bring down the entire European Union. Manuel Valls said that the “very idea of Europe†will be torn apart until the flows of migrants expected to surge in spring are turned away. On Monday, interior ministers from the EU will meet in Amsterdam to discuss emergency measures to allow states to reintroduce national border controls for two years. The powers are allowed under the Schengen rules, but would...