Stevan Stevlic posted this today on Fred08.com.
Here is another reason for Fred to stay in through the convention. In the election of 1860 the candidate that was fourth (fyi that’s worse than third) in delegate count became the nominee. He only won one state going into the convention, his own home state. He won at the convention because he was the only candidate that was acceptable to all the wings of the party. That candidate was Abraham Lincoln.
Granted Lincoln didn't have to deal with the MSM.