Here is an excellent Von Mises video on the modern political spectrum:
There are things in this presentation that an Objectivist will disagree with (he is an Austrian after all), but he lays out what the Overton Window (ie mainstream) political views are and what the Socialist Left and the new and emerging populist alt-right views are, and he uses a nice chart that you can pause and take it all in.
I don't think that America is going to survive for much longer. When you look at how divergent the political views of the various movements are, I can't see how 330 million people of different races and ethnicities and religions and cultures and average IQs are going to continue to exist in one nation that was intended to be a republic for white North West Europeans with only land owning white males being allowed the franchise.
Where Objectivism and libertarianism fits in to this is anyone's guess. But the alt-right looks to be the right wing of the future, for better or worse.