I'm not that person, but the Pew Research Center says that, in 1994, 57% of Democratic voters were white non-college graduates, while in 2019, it was 30%. For Republicans, 68% of their voters were white non-college graduates in 1994, and it was 57% in 2019. The Democrats seem to have been shedding this demographic much faster than Republicans have been.
They do say that there's a relatively recent shift in voters who went to college towards the Democratic party.
The Republican Party now holds a 6 percentage point advantage over the Democratic Party (51% to 45%) among voters who do not have a bachelor’s degree. Voters who do not have a four-year degree make up a 60% majority of all registered voters.
By comparison, the Democratic Party has a 13-point advantage (55% vs. 42%) among those with a bachelor’s degree or more formal education.
This pattern is relatively recent. In fact, until about two decades ago the Republican Party fared better among college graduates and worse among those without a college degree.
I don't know if it qualifies as a shift, significant or otherwise, because I don't know how it was before. But a quick internet search for "biden trump voters education level" brought forth a few reports by news sites and research outfits.
According to Ipsos and Reuters about a third of Trump voters have a college degree or better. Pew has an more detailed analysis of voters for the 2016. 2018, and 2020 elections here [1], including education, which seems to confirm this.
Not sure I believe this. What's the source of this statistic?