The MSM in 2008 kept the candidacy of John Edwards viable (despite his bastard child) long enough to keep Hillary in a three way race for delegates, unable to secure the nomination.
The lack of super-delegates collapsed her campaign.
It’s the same issue now for Jeb....he has the super-delegate count in his pocket, but he can’t win any state beyond Florida. It’d look awful screwy for him to show up and win the convention with one state and a boatload of super-delegates.