If you follow politics on social media, video clips of long-shot 2024 presidential candidates have likely been all over your feeds recently, sitting in studios or offices with podcast microphones pressed to their faces. In recent months, Democrat Robert F. Kennedy Jr. and Republican Vivek Ramaswamy have embarked on a podcast blitz, using their campaigns as calling cards for any show that will have them on—from obscure history, wellness or crypto podcasts to Elon Musk’s Twitter Spaces and Joe Rogan’s popular program.