Ranked-choice voting is popular in other parts of the voting world, but not in the United States. That could change, if voter advocacy groups get their way. So how does it work? What are the possible advantages or disadvantages to ranked-choice voting? Would it change the outcome of presidential or other elections? Our guests debate it: Seth O'Bryan , teacher at the Harley School Tim Kneeland , chair of the department of history and political science at Nazareth College Jesse Lenney , western