It's entirely plausible that Texas votes to the left of both states.
What makes you think it's plausible? Not saying you're wrong.
For one thing, Biden isn't polling all that much worse in TX as compared to NC and FL. Using the same polling errors from 2016, FL would still narrowly go for Biden, NC would narrowly go to Trump, and Biden would also narrowly win TX. Obviously, polling errors aren't bound to be exactly the same, but modestly small polling errors can go a long way. TX is a state where good turnout benefits the Democrats; on paper, TX should be bluer than it is, but in almost all cases it's just because Democrats are unreliable voters. If 2020 is to be a high turnout election, expect, but don't count on polling in places like TX to underestimate Ds.
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