Where on political spectrum could third party come from?

[LabourJersey]

The only plausible third parties that can arise in America would be state-level parties that have unique coalitions that prevent certain states from becoming permanent trifectas for a single party.

For instance I can imagine a political group focused in the South that has populist/center-left ideals and harkens to the tradition of Roosevelt (and maybe Huey Long), but has a nationalist element and avoids any connection with the "woke" groups in the Democratic party. A coalition like that could displace the Democrats in state/local elections and win legislatures & governorships in Alabama, Mississippi, Arkansas etc.