Romney was chosen by people voting for him. Its not some huge conspiracy.
Let's go back to Florida. The RNC's own rules state that it is no longer a "winner take all" state. Gingrich had momentum from SC. The RNC refused to make a ruling. Florida was given to Romney and the press touted him as THE candidate. That has continued. Santorum started winning. What came of that? The press said "Romney has momentum!" They even cheated Santorum in Iowa.
Sam, have you missed all the shenanigans?