The tactic of crossover voting, when voters cast ballots for a party with which they are not traditionally affiliated, is mostly applied with the intention of undermining the opposition. It has an unfortunate reputation, but what if it’s used to save the Republic, wonders Elizabeth Kolbert in the New Yorker? Kolbert joined the John Adams online last June to talk about her book Under a White Sky, about the pros and cons of geo-egineering. Click here for the video.