Taipei mayor Wayne Chiang Wan-an has emerged as the biggest political winner from an opposition protest against the government’s handling of a food safety scandal that drew what organisers said were more than 200,000 people onto the streets of the city. The unexpectedly large turnout appears to have given the island’s main opposition party, the Kuomintang, fresh momentum ahead of the local elections in November and could reshape the race to become the party’s candidate in the next leadership...