Doubtful that Obama will pull out a win in PA.  And if Hillary wins by 1 point the headlines will blare "HILLARY WINS PA".    

Regardless, she's gonna have to say something to exit this race and reunite the party.    For her own political future and the Clinton legacy, she's too sensible (politically) to go down in flames.   ....   Okay, maybe she's not.  But some of her staffers might see this and give her the idea of how to exit gracefully and look like a hero in the process.