I don't think it's just a 'liberal' thing, whatever liberal means these days (or 'conservative', for that matter), Jake.

We have an enormous military.  Huge by any measure.  Much larger than we need to protect our borders.  So do we shut down our overseas bases?  Get rid of aircraft carriers?  Stop fighting ISIS?  I'll start to believe this talk about nationalism and focusing on Americans when I see one single attempt by either party to reduce our defense budget in any meaningful way.  Never gonna happen.  The defense industry owns congress.