Because "Vote your conscience" is the code word for NEVER TRUMP. And NEVER TRUMPERS were all Cruz people. And everyone at that convention bloody well knew it.
Sounds like an assumption.
Not at all. The Never Trumpers were in high gear to try to remove Trump from the ballot and be replaced due to a delegate "vote your conscience" clause in the RNC rules.
Really quite simple and plain as day what his message was.
"As my colleague Jim Newell
noted, Cruz’s phrasing subtweeted a lot of the “Never Trump” tumult that preceded his appearance.
The senator’s supporters had attempted to slide a “conscience clause” into the party rule book that would unbind the delegates, relieving them of the obligation to vote Trump.
The measure failed, and then a petition demanding a roll call vote on the rules
got snuffed. In that context, “saying ‘vote your conscience’ wasn’t
just a non-endorsement of Trump,” Newell concluded, “it was a big kiss blown to the anti-Trumpers, thanking them for their service in Cleveland.”
What Conscience Means to a Conservative