What would it take for the two American Political Parties, the Democrats and Republicans, to ideologically sort into a progressive and a conservative party?
OTL it seemed that following Nixon's resignation the Conservatives had won: Connally was President from 73-81 after all.
But then we had 16 years of Jimmy Carter and Bill Proxmire. Tight money, deregulation, deficit hawkishness, a certain degree of foreign policy hawkishness, Carter's being somewhat public about this evangelical faith, etc.