There is no "far left drift" of the mainstream. Outside the gender craze which is real, the "far left drift" is an entirely made up talking point in the conservative war against basic institutions and freedoms.

For example, never in its history was the SCOTUS so conservative compared to the views of the general population. It used to be one of the most progressive actors in society, forcing race and gender equality judgments to a country where working wives and interracial couples were still a faux pass.