Sanders assuming the US had a better electoral system that wouldn't immediately result in Christie winning the Presidency because of vote-splitting.
In the real world, Hillary.
The obvious answer.
...
Sanders, without a doubt.
And I would vote Sanders whether he could win or he could not, because Christie isn't that much worse than Clinton.
Yes, he really is: Christie is way,
way worse than most lefties seem able to recognize, and Clinton is likewise not nearly as bad.
Now, if it's Christie vs.
Cuomo... that would give me pause, since Cuomo is really sort of horrible.