And yet despite this continuing apparent massive movement to the right there is still a close balance between Democrat and Republican voters. So either the whole USA is veering rightwards en mass (which seems unlikely), or nothing has really changed except the definitions.Again wrong. The political right had moved to such extremes that to them, views that would have firmly right of center in the 1990's are now being called "socialist" in right wing political dogma. In the US, economic polices that were "core conservative values" 25 years ago have been completely abandoned by Republicans and now form the core of mainstream Democratic economic policy.
The right wing talking heads now call these things "socialist" in order to keep their power base from fragmenting so they can hold onto power even though they have no realistic policy ideas of their own. Since they have no actual policies to pursue holding onto power for powers sake is all most of the old guard are doing. The scary thing is that the younger idealist are actually willing to try some of the bats*** crazy ideas that is all Republicans have left after 40 years of moving farther and farther right to maintain a differentiation between themselves and Democrats.
This is why economists who have used to support Republicans now vote Democrat by a wide margin. In practical terms many policy ideas promoted by more intellectual Republicans are often indistinguishable from AnCaps.
With the rise of Trump, this is somehow glued together with populist Republicans that support something resembling the Fascist countries in WW2. This includes both economic isolationism that restricts imports under the guise of "self sufficiency" while exports are encouraged as a means of projecting power. Privately owned business is encouraged but only those that are willing to support right wing leaders in their political goals are supported by government while those who refuse such support are undermined at every turn.
This is a toxic mix that history tells us can only lead to explosion or implosion, but everything else is deemed "socialism" by the talking heads in order to keep the rank and file in line.
None of which affects the definition used on this forum as requested by Dualb.