There’s the American Solidarity Party, which is sort of a niche take on the concept (since they’re based on Catholic Social Teaching, they’re liberal on matters

There’s the American Solidarity Party, which is sort of a niche take on the concept (since they’re based on Catholic Social Teaching, they’re liberal on matters of immigration and race), but curiously they’re like the only attempt at the quadrant after decades of the Libertarian Party being the biggest third party, alongside the Greens and countless further left, further right, centrist, single issue, and smaller libertarianish third parties.