My point was - and it went over your head - was that the shift of the white working class happened under Nixon, not Biden.
As for more up to date data-
ropercenter.cornell.edu
The Republican share of the White vote hasn't shifted much since 2012. Romney got 59% of the White vote in 2012.
Trump got 57% in 2016, 58% in 2020 and 57% in 2024.
Oh, and Biden didn't lose those votes, Harris did. Probably because the Dems lost credibility claiming Biden was fine until he wasn't.
Now, keeping in mind that Trump lost the popular vote in both 2016 and 2020, the only time he "won" the popular vote (with a whopping 49.8 of the electorate in a record low turnout year) was in 2024.