Still, the political reality is that there are two distinguishable wings, and one is reliably even worse than the other, currently much worse overall. To be in denial or to act in neglect of that reality serves only the possibly imminent, yet presently avoidable, victory of the worse.
The traditional third-party mantra, “There’s no significant difference between the major parties” amounts to saying: “The Republicans are no worse, overall.” And that’s absurd. It constitutes shameless apologetics for the Republicans, however unintended. It’s crazily divorced from present reality.