If the GOP trends populist...

[Scam of God]

They'll be basically the Democrats under Truman - I believe the socially conservative wing of the GOP to be about sixty years behind the times; there probably remains a not-insignificant minority of hardliners who are not yet comfortable about desegregation, though they will die off soon.

[Scam of God]

Uh, no. Libertarians and social leftists certainly disagree on how to accomplish their social goals, and you sound laughably hackish calling them "left-wing" when most bog-standard libertarian purists would have economic scores of 9.0+ or better.

A social leftist could very well support gun control. A libertarian most certainly not. A DLC-type would be in favor of law-and-order programs. A libertarian despises such nanny state tactics. Etc., etc.