Hillary nearly won without the cultists on the far left. If they truly despise Trump then they will come around to Warren. If they have a problem with her, then good chances they'll eventually find something they don't like about Abrams.I actually really like Gillum as a candidate and think he bodies Pence in a VP debate. My concern is that the lefties that are skeptical of Warren on things like M4A actually had a similar set of questions about Gillum after he won the primary and softened his rhetoric for the broader base. I like Gillum as a candidate better than her, but think Abrams would get more love from the lefties tbh but that's speculation on my part. From what I saw, Gillum got hit with skepticism that Abrams was able to avoid for some reason. I remember things like this Jimmy Dore clip and think if anything, Gillum might actually turn the lefties that are already skeptical of Warren more off (not myself but a significant chunk of the left that I typically debate with about strategy as it is).
I feel like Warren is already covering the bridge candidate role. She should sure up either the lefty purists or the centrist purists with her choice. I'm not sure Gillum accomplishes that. I like Gillum as VP on any of the more centrist candidates' tickets more. I think he'd make any of those candidates an easier pill to swallow for the left leaning squad like myself. But if you go further left (honestly, I don't even know that I'd categorize them as to my left but just different lefty demographics), I'm not sure he does anything for those heads. That's the Tulsi, Yang and a chunk of the Bernie supporters I have in mind here. It's not that he's not good for plenty, I just think Warren already has those votes locked up assuming she wins the primary (she's got me locked up).