Conservative Bart De Wever was sworn in Monday as Belgium’s new prime minister, after striking a hard-fought coalition deal that moves the country to the right. Struck late Friday after seven months of tortuous negotiations, the agreement makes De Wever the first nationalist from Dutch-speaking Flanders to be named Belgian premier. The 54-year-old — who in recent years has backed off on calls for Flanders to become an independent country — took the oath of office before King Philippe, in a ceremony at the royal palace in Brussels.