At this point in time, Ron Paul has lost his support, so it doesn't matter where he was born or what country his parents held allegience to. He's finished.
Agreed, but it would appear that Gingrich and Santorum seem likely to also be finished before long and, if it is Obozo vs. Romney, the country is likely to be finished along with them, making this discussion somewhat moot. I would be delighted to see those two excluded from the POTUS race by natural born citizen claims, if necessary. SCOTUS ought to resolve the question but SCOTUS will recess for the summer in late June or early July and not return until the first Monday in October. That is not a very promising schedule for what would normally require a lengthy process.