Here are five takeaways from New York City’s second experience with ranked-choice voting, and how it helped Zohran Mamdani secure a decisive victory.

New York City is using ranked choice voting in its Democratic mayoral primary election. Here's how it works: Rather than pick just one candidate, voters get to rank several in order of preference.

Here’s what you need to know about why Philadelphia doesn’t use ranked-choice ballots, and what it would take to adopt the approach.