Probably none, huh? While FR does have a vocal libertarian wing, we're also the biggest Bush cheering section around. Supporting the President won't get you in trouble here.
I suspect you probably know this.... but FR has always had a strong representation of libertarians, and has always had a strong contingent of republican party faithful... and they've always argued like cats and dogs over many issues.
And sometimes... they even agree about stuff.
That's part of the charm of the place.