I think after Trump wins Indiana the media will be forced, grudgingly, to begin promoting this scenario. Trump will begin to pick up many more endorsements and his momentum will soar,,,,,,,,,,,,
The media may be grudgingly moved to say, well, yeah, The Donald MIGHT be the presumptive nominee.
The Establishment Republicans are still going to have to catch a fetch upside the head with a p*ss-elm club before they begin their attitude change.
Fortunately the really doctrinaire members of this exclusive club are not all that great in number, and there seem to be defections daily.
It is kind of like watching ice melt in flowing water.