"White, suburban women with college degrees fled the party in droves."
This, we have not been able to quantify.
1. We know that white, college educated millennial white women are not becoming Rs like their moms & thus
2. We know that in 2018 these voters greatly improved their turnout over the 2014 midterms & 2016 & swung suburb and House seats to the Ds (BTW: I'll soon be adding FL, GA, TX, and AZ to my analysis).
BUT we do not have, as of yet, quantifiable evidence that white, college educated women who were R identifiers have quit the Republican Party "in droves" especially not in the context this author asserts, which is that they are voting for Ds.
Of course, we all know Rs who have defected the party over Trump. They exist. But there is no