Some progressives are in denial that Hispanics switched sides from 2016-20. The Warren wing would have lost the trifecta without a doubt.
Warren wing, definitely- but not necessarily Warren herself.
The most viable path to beat Biden for the nomination without a Biden own goal would have been an economic leftist candidate with a socially conservative streak. Think of the original Two-Income Trap Warren platform circa 2005. Such a candidate would have done exceptionally well in the COVID environment, too, likely having a bigger GE victory than Biden.
Numerically yeah there were some individual Tejano voters in the RGV (and Mexicans in Metro Houston) who voted HRC-45, but the majority of 45’s gains in Texas seemed to be from turning out previous nonvoters.