An alleged traffic offence involving a Hong Kong lawmaker has sparked a fiery exchange between a veteran of the city’s biggest party and political heavyweight Regina Ip Lau Suk-yee, who defended her protege and was accused of double standards. New People’s Party chairwoman Ip, convenor of the government’s key decision-making body Executive Council, reportedly snapped at former lawmaker Choy So-yuk, questioning whether her Democratic Alliance for the Betterment and Progress of Hong Kong (DAB),...