At this point I'm pulling for Warren but Biden is assiduously courting black voters and doing very well in the polls with them, the older ones anyway. But I agree with Bill that anti-Trump sentiments might be the prime motivator for minorities. Trump slagging Puerto Rico and Puerto Ricans via Twitter just as Dorian was approaching couldn't have done him much good with Latinos, not to mention all his other overtly racist remarks and policies.
(Here's a hot tip, Bill- Jai-Alai by Cigar City, an IPA that rivals DH 60 Minute)