Democratic Party RIPPING apart????

i was just wondering if the democratic party will indeed rip itself apart. watching the news it seems that there is a lot of pressure and tension between the party, which is caused by Obama and Clinton having such a 'close' race. i heard that it was mathematically, highly unlikely that Clinton even has a chance of winning the needed amount of delegates to become a nominee. what's your opinion on this matter???? should florida and ,i believe, michigan cast a revote? that would be unfair though, right. all candidates agreed that they wouldn't count and in michigan clinton was like the only one on the ballot, right. i am unbiased, but very interested.