The existing party system is in full collapse. This neatly follows the disappearance of policies from an aging, racist Republican party dedicated to plundering the national wealth for the benefit of their billionaire owners here and internationally. There is literally nothing there but ignorance and hatred.
Economically our only hope is the inclusion of immigrants. That will create the diversity we need for growth and innovation in a world that requires planetary solutions if our species is to survive our own messes.
Ironically the very racist and xenophobic bullshit that is the sole position of the minority party will accelerate the failure of the American economy. Immigrants provide a generation of hard workers to handle the manual work that are already going unfilled due to Trumps absurd and illegal actions.
At the other end of the scale the Republican lead destruction of education over the last forty years leaves our top engineering positions to be filled by Indian and Chinese workers. We are completely dependent on an international workforce.
The world has left the aging racists of the Republican party in the dust. They can only shout about things long ago settled. They will probably succeed in destroying the country but that is on them. Most of the country will simply leave.