It's pretty rare that we get a real certified liberal (or socialist) candidate for President. While Hillary seems ok on many issues, there are a lot of unknowns about her. No such doubt with Bernie.
He's got my vote, and he's going to get some money from me too.
And it looks like Bernie has raked in more campaign cash in the first day than anyone else yet running. Even Hillary! I saw that because Hillary didn't announce how much money she took in within the first 24 hours. (It was probably 10 million or more)