✓Senator Kamala Harris (D-CA): 55.7%
Senator Bernie Sanders (D-VT): 42.7%
Highly Unlikely, she'd have the support of blacks but as we've seen with Obama vs Clinton, Sanders would probably have the support of Hispanics, White men and importantly White women and Progressives. He would crush her in the Midwest and the intermontain west, the Northeast except, maybe, for New York and New Jersey, and he would probably pick off a few southern states like Tennessee, Oklahoma, West Virginia, Kentucky, Florida and Arkansas. Plus Harris is just Clinton, but black. She had ample evidence that Steve Mnuchin and OneWest bank had illegal dealings but chose not to implicate either. Both Mnuchin's wife and OneWest bank gave money to Harris's campaign.
