With elections now delayed to 2021, the recent arrests of activists and a pro-democracy media tycoon in Hong Kong likely herald a new period of more aggressive crackdowns on figures Beijing perceives as threats to the city's stability. On Aug. 10, Hong Kong's newly established National Security Department police unit carried out a series of raids and arrests across the city that netted 10 individuals for allegedly violating the new national security law. The city's year-long election delay will grant Beijing and city authorities greater room to escalate crackdowns without undermining the legitimacy of pro-Beijing candidates, or sacrificing the city's political system and jeopardizing its role as a global financial hub....