How Bernie Sanders can be the Democratic Nominee

I am not saying that Bernie has it in the bag but what I am saying is that he does have a chance to win. Obama won South Carolina, Iowa, and New Hampshire in both elections.  I am pretty far from  a Sanders supporter but I can see how he can pull it off.  As of today, I am pretty sure he will win New Hampshire and he can win Iowa and South Carolina if he continues to rise. But Bernie Sanders is very popular with middle and lower class voters who don't always vote.  I think if he can win those three states he can gain momentum and win the nomination.   However, in most polls Sanders can't win very  significantly versus most GOP candidates  except Trump. Clinton has a much closer race.  If I had to call the entire election today I would pick Sanders and Cruz, with Cruz winning.