TX, PA, and OH

Mr. Obama is 150 delegates ahead. The three biggest races to come are: TX, PA, and OH. I think that he is going to win all three with the following percentages: TX 64%, PA 66%, and OH 62%. This would make him ahead by an additional 150 delegates, total ahead 300. These wins will guarantee his candidacy to run against the leading republican. I might be wrong but I hope I am right.