I think going through the remaining twenty states that are still left for the dems and a conservative calculation is Obama getting over 1900 delegates not including the Super Delegates. So, as long as he can get aportion of the Supers he should win the nomination even if Hilary wins out in Tx and OH as well as Pennsylvania. Since on like the Republicans the Dems have delegates broken up based on districts.
1550 delegates
current totals:Clinton:1100 Obama: 1075
Primaries/caucuses left and delgates left:
http://politics.nytimes.com/election...ies/index.html