I guess you missed it. Rubio said he wasn’t endorsing Cruz, so his delegates don’t belong to Cruz.
They do on the second ballot. there is a nuance.
Also Rudy ( we love Rudy here , right ;) ) will vote for Trump but not endorse.
Rudy does not want to stump for Trump.
The obvious wave of second ballot delegates is what puts fuel in Cruz’s tank— along with the forced VP play.