Having spent a decade in university, working with professors then and now that I am finished and employed along side them, as well as working with people who do research as a profession - I can tell you that it's not going to change that highly educated individuals are more likely to be left leaning and liberal.
The fanaticism, conspiracy theories and general madness that is peddled by extremists on the right and the general status of the right wing in the US is not conducive to the sort of culture you find in a university. You must consider that professors holding doctorates are not just teaching, but also doing research. Particularly if you are looking at STEM fields, they deal in facts and rational conclusions on a daily basis.
The only way I could see the more liberal slant of academia ever changing, is if the fanatics of the right everywhere, and the crazy of the US right - suddenly put down the pipe and stopped spreading lies, conspiracy theories and general idiocy as their messaging. That sort of garbage does not fly with people who make a living of doing peer reviewed research.
You're hard pressed to find anything to respect with the fanatical right these days. They deny science, stick dogmatically to bronze age religious myths and continue to dogwhistle and succumb to racism and fears of the other. If they check back into reality they might find they get some respect again. Right now they are just the crazy degenerates trying to drag society back into the dark ages, even as they enjoy the fruits of what academia and research has brought to society in technology, medicine and essentially everything that has advanced us from living in caves and having to hunt with spears..