With the presidential election approaching, some voters are wondering how we again ended up with Donald Trump and Joe Biden as the presumptive nominees.Recent focus groups with swing voters put into words why some people are turning away from the main candidates, and polling gives us an insight into what this could mean in November.For sponsor-free episodes of Consider This, sign up for Consider This+ via Apple Podcasts or at plus.npr.org.Email us at considerthis@npr.org.