When did white college grads become more D?

[King of Kensington]

When did whites with college grads begin voting to the left of whites without degrees?

I'm guessing in the 1990s or maybe the 2000 election?

Though 1972 may have been a situation where they did as well

[Del Tachi]

Elections where white college grads trended left, probably include (since 1960):

1968
1972
1980
1984
1996
2000
2004
2008
2016
2020
2024

[The '90s' Last Champion]

1996 seems to have been the last time that college whites voted right of non-college whites. (though it seems they did vote left of non college whites in 1984 due to Reagan winning lots of normally Democratic non college whites, I suspect that might have been the case in 1972 too), but 2000 is when it became a consistent pattern.

[Arizona Iced Tea]

Around 2000 it became the norm, but white college voters were still an R leaning demographic. Obama only narrowly won them in 2008 and Romney did very well in 2012. It wasn't until 2016, when they really became part of the Dem base mainly due to the leftwards shift with college white women.