Legacy Parties

New to me, not quite new. I.e., "parties," as in "Republican" or "Democrat" (maybe also Whig?).   Urban Dictionary does not yet have "legacy parties," but it does define "legacy" as: 

In computing, describes outdated, obsolete hardware or software. Usually a pain in the ass to support. Often refuses to die.

 I found it here,  Go read it, the whole piece is a stitch.