A guessing game on whether Davao City Mayor Sara Duterte will run for president.<br /><br />Though she filed for reelection, her father President Rodrigo Duterte says his daughter would still run for the highest post in tandem with Senator Bong Go. A political analyst says voters already know this kind of game and the tactic may backfire among them.<br /><br />Our David Santos has more. www.cnn.ph