Brokered convention can be avoided theoretically. Currently the "delegates needed to win" total includes the delegate totals if Michigan and Florida counted. You could therefore argue that those 300-something delegates should be removed from the "total" pool, thereby decreasing the number needed to win the nomination. Seems perfectly logical and straightforward to me. Also, people are suggesting that Obama is going to win Ohio already. If he wins Texas in addition to Ohio, there's no way the convention is brokered. The superdelegates will make him the nominee.