HONG KONG—A coalition of Christians and Catholics on Monday called on Hong Kong leader Carrie Lam to drop charges against media tycoon Jimmy Lai and other political activists jailed or in custody under a Chinese-regime-imposed national security law. The petition by more than a dozen Christian and Catholic groups and leaders was handed to a government representative outside Hong Kong’s government headquarters. “She could be active in asking Beijing [for an amnesty],” said Catholic priest Franco Mella, referring to Hong Kong’s leader Carrie Lam, who is a Catholic. “Let’s hope she gives an answer to the voice of her conscience as a Catholic,” Mella said, flanked by Reverend Chi Wood Fung, a Hong Kong Anglican priest and former lawmaker. “I hope more voices can be heard about the possibility of an amnesty for them.” Lam’s office did not immediately respond to a Reuters request for comment. Among the signatories was …