The Republican party is only right in the sense that they've gone over the edge, and the Democrats have chosen to stop short of it. We don't really have a left with meaningful power in the US unless you bulldoze the traditional meaning of left and build a shopping center over it. What we have is a nationalist party and a neoliberal party domestically. Every so often a member of one will realize this and move over to the party that aligns with their views. Both are nationalist when it comes to geopolitics.