Schematically, in OTL the Republican party is conservative and Democratic party is progressive,liberal (or at least less conservative of GOP).
But starting from early XX century is possible imagine a timeline in which the Republican is the party of progressives and liberals and Democratic is the party of conservatives?
For exemple,is possible imagine the Republican party more and more progressive from 40s (with Presidents as Dewey and Rockefeller) and the democratic climbed by very conservatives politicians (said a Goldwater democratic)?