I completely disagree with socialism at the federal level, but I'm not opposed to welfare programs at the state level if they want to go that route. In this sense, I could see someone running as a 'Ron Paul' democrat; pro-welfare, but not at the federal level.
I've found that a lot of democrats actually really like Ron Paul. Watch the Bill Maher episode where he had Ron Paul on, back in 2007 I believe -- Paul got pretty heavy cheering from the crowd, and Bill Maher's audience tends to be rather liberal. Bill Maher actually really likes Paul, too, though of course he doesn't agree with him on everything. All but one of my democrat friends are hoping Paul wins the republican nominee, because they aren't really all that happy with President Obama. Two of them actually commented that, were Paul to win, they'd seriously consider voting for him. And note that these are liberals, not moderate/independents.
I'd also like to point out that we're pretty out of place in the current Republican party. Argue all you want that we're the true Republicans (I agree), but we have to realize that the true Republicans aren't the majority anymore.
Personally, I think Santorum or Gingrich would be a far worse disaster than Obama. Not that Obama has been good, but at least Obama can show restraint in some departments. Were Santorum president, we'd surely have nuked iran, and contraceptives would probably be a Schedule I drug. Were Gingrich president we'd probably be in basically the same place as we are now, except with moon bases and executions for pot smokers.
Personally, I think both parties are equally wrong. At least Democrats are honest about being big government, though. A lot of modern Republicans talk the talk, but when push comes to shove they vote for the drug war, federal marriage amendment, patriot act, NDAA, SOPA, and pro-empire building. Can someone please tell me how any of those things are pro-libertarian?
Liberty brings people together. Even democrats.