While Democrats are still trying to figure out a big part of their 2020 election strategy, like which of the very many candidates running will represent them, Republicans already know who their nominee will be (or at least are almost certain of it) and are planning their 2020 strategy accordingly. But that doesn't mean there aren't challenges that lie ahead. Galen Druke with fivethirtyeight.com looks at what the Republicans need to know as 2020 inches ever closer. And the swing voters: Who are they and how many are there? Galen chats with Tony Cruise.