Tammy Baldwin. She's much more likeable than Warren but just as progressive as her, has proven that she can win in Wisconsin (we'll see what happens in 2018, but I don't see her losing) and could unite the different factions of the Democratic Party. She wouldn't have an easy time in the Democratic Primary, though.
I really like Tammy, but there are many people who will vote against her simply because of her sexuality. I agree it's a bulls**t reason to vote against someone, but there are people like that out there.
