It's a good idea, and I agree Pod Save America would be a good bit.

I think it's also worth considering non-political podcasts, since finding out that everyone who likes the thing you like is a lefty is just naturally going to pull you left, and smallish podcasts will chase after sudden influxes of fans. My first thought was those surrealist comedy podcasts like Night Vale or Beef And Dairy, but I think I overestimated how popular they are because the woman who keeps recommending them to me is such a cutie. By the numbers the most popular ones are true crime stuff, which aren't my jam, but if there's a bunch of people here who like them then more power to you, get organized.