The alternative being…? What, third party candidates? Are you kidding? The only alternative to “blue no matter who” is more “red” and as you can see, there is literally zero support from “red” whereas there’s at least a substantial fraction from “blue.”

I don’t think many people who said “blue no matter who” are actually very surprised by this, because the phrase is not coming from die hard supporters, it’s coming from anyone with basic logic skills.