[NotAMoose]

The suggestions are random based on interests you've chosen, and based on how the volunteer community leaders (mods) have tagged their communities. So if you picked "politics" as an interest during onboarding, it will suggest popular communities that have been tagged as such.

If there were popular republican communities on the site, our system would recommend those to you.

We're a new site, and our userbase so far is pretty liberal leaning.