It is still possible for her to win... so I guess she has every right to run.
But it certainly isn't very smart. Pretty much all of the tactics she'd need to employee in order to win (seating MI and FL, dirty campaigning, etc) will lose her the November election.
Furthermore, she's gonna start really pissing off a good number of her Dem colleagues as she continues to ruin what should have been an easy win for the presidency. Surely not good for her future career in politics.
both fl and mi will get "resolved" but it won't impact the nomination
In fact, throwing in the towel will END her career in politics. She knuckles down and she's able to throw her husband off her back and go for self.
Obama's win of the nomination will be the end of BILL Clinton. It will be the BEGINNING of Hillary.