I still think Eridan's character arc is an allegory for the Obama presidency

Think about it - the supposed Prince of Hope knocks out Sollux (bipartisanship) and betrays Feferi (social welfare programs) and Kanaya (the LGBT community) in order to suck up to the Fascist Murderbeast Bec Noir (the GOP), who feels irrational loyalty to Jade (Reagan), a figure whom Noir does not truly know or understand and whose actions have often directly contradicted his stated ideals and goals.

Eridan then goes to confront Gamzee (the increasingly dispossessed and dissillusioned muddle class) and Vriska (Vriska) with the intention of eliminating them as well, while his past self has made futile attempts at flirting with Karkat (true leftism).