Putting Democrats in the same sentence as social libertarianism is laughable.
Democrats love to legislate based on questionable science; 2nd hand smoke, global warming, etc. The national party would just assume overturn the 2nd Amendment. Today's Democrat party is run by feminists that would shut you up if they disagree with you. Let's not forget the Kerry campaign's threats towards book stores that dare carry "Unfit for Command" and towards Sinclair Broadcasting. Reeks of censorship to me!
The Republican Party isn't perfect, but I do believe most Republicans are stronger on social libertarian issues than most Democrats are. Don't get me started on economic issues.