Uncensored2008
Libertarian Radical
Only recently and only Rand Paul.
You asked for "Liberal social viewpoints rooted in conservative philosophy."
It has nothing to do with a role call.
The weakness of the GOP is from the decline of the old "Moral Majority" and the rise of the Libertarian faction.
For decades, a significant portion of Republicans and those like me, who have left the party but may vote for a GOP Senator or Presidential candidate, have supported real liberalism.
Most Republican Millennials favor marijuana legalization Pew Research Center