If that's their strategy, they are getting increasingly delusional.

In my experience - admittedly it has been a while, the majority of PLEO (Political Leaders and Elected Officials) delegates are more concerned to protect/advance their own careers.  Anything and everything else is secondary.  Obama, by winning the elections on/in their turf is going to be a large factor in his favor.  Clinton can say she will do this or that for them; Obama can deliver votes.