It will be settled before that. If Obama closes the gap in Pennsylvania and if he wins out in NC, Indiana and Oregon it will be over. The Superdelegates will stampede to Obama and he'll clinch the nomination. Once that happens they will seat the Michigan delegation giving Clinton the % of delegates she won and Obama the rest. Florida is dicier, and if Edwards endorses Obama he could pledge his delegates to him, and add them to whatever Obama won. In fact so could Biden and everyone else who was on the Florida ballot. This would be a cae of Hillary being careful about what she asks for.

The real question is will she bow out with grace.