The Democratic party adopts Bernie style positions on economic issues and begin to weed out the establishment/liberal elite, such as the Clintons/Pelosi, becoming less of a social and more of an economic party while adopting libertarian positions on social issues. The GOP takes Trump-like stances on trade and immigration while also putting less of an emphasis on social issues (abortion, gay marriage), rejecting the religious right, and adopting positions of electoral reform. Both move downward on the political compass, the Democrats encompassing the green section and the Republicans the yellow and lower purple section. Both parties become highly competitive in the inner West and Midwest, while the Democrats retain the Northeast/West Coast and the Republicans retain the South.
Moderate voters in states like Virginia and New Jersey, disillusioned with the populist direction of both parties, begin a new Center Party which attracts former members of the moderate wing of the GOP and Democrats and gains some ground in the mid-atlantic and south.