Buttigieg went retro. Warren went digital. The Iowa caucuses might finally settle a long argument over what really works better for politicians: social media or TV? We take a look at how success in this year's Iowa caucuses could decide the future of campaigning at the link in our bio. 🎨 jningwong for Politico Magazine #iowa #advertising #campaigns #democrats #election2020 #thefridaycover #longreads #petebuttigieg #elizabethwarren