Those on the radical extremist fringe are no longer stuck on the margins, as Republican politicians break their necks to embrace them as part of the mainstream. There are only a small handful of progressive commentators pointing this out.
"The two parties have combined against us to nullify our power by a ‘gentleman's agreement' of non-recognition, no matter how we vote ... May God write us down as asses if ever again we are found putting our trust in either the Republican or the Democratic Parties." -- W.E.B. DuBois (1922)