There's two main reasons why Obama most likely will be the nominee - THE MEDIA and a BROKERED ELECTION.
There's one main reason why Obama won't be the president - REV. WRIGHT
I really don't know what you mean by a brokered election. There's a common term - a brokered convention - is that what you're talking about?
Yes the media that was all Wright all the time 24/7 for 3 weeks. They failed to take him down. Obama won plain and simple. Pledged delegates, popular vote, number of states, super delegates, money raised, superior organization.
McCain has an albatross around his neck that makes Rev. Wright seem like an minor irritation. He's called George Bush, remember him?
99% of voters will not remember or give a crap about the primary in 2 months. It will be ancient history. They will care about the price of gas, food and healthcare, they will be very aware of collapsing housing prices and a scary economic future thanks to GWB. They will still be waiting for the surge to bring 'victory' in Iraq. Will they want more of the same with Bush III?
Republicans are getting hammered in the reddest of red districts. The electorate has got the tar and feathers out and is ready to run the Republicans out of Dodge. Obama has the message, the organization, the political skills and a fired up electorate.
All the doom and gloom predictions we have been hearing about the Obama campaign collapsing any day now. They were totally and completely wrong. They are still predicting doom, still droning on about Wright and they will be just as wrong come November as they are today.