HONG KONG—A new law that tightens patriotic loyalty tests for Hong Kong politicians will take effect later this month after being passed by the city’s legislature on May 12, local media reported. The law is widely expected to further stifle democratic opposition in the global financial hub, extending oath-taking requirements to community level district councils that are dominated by pro-democracy politicians following a landslide win in November 2019. Publicly-funded broadcaster RTHK reported that more than 20 district councillors have resigned in recent months, some because they were not willing to take the oath and others after being detained under a sweeping national security law imposed on the city by China’s parliament last June. The new law allows the city’s Secretary for Justice to launch action against a politician or official who is deemed to have violated an oath under a “negative list” that proscribes a broad range of unpatriotic acts, …