Pretty sure this whole Ukraine scandal is going to tank Biden's numbers and hand the nomination to Warren. The similarities are too close to 2016's smears, he's not handling it well enough, his perception among black voters as the most likely too beat trump is what's helping to keep that inflated. As soon as a critical mass of people see Clinton 2.0 in Biden's candidacy his numbers will implode and the best second choice right now is clearly Warren.