It’s not only moral, it’s smart, shows great planning abilities and organization, and shows an understanding of politics, elections and the government that equals Trump’s understanding of real estate.
The delegates HAVE to change their votes on the second ballot or you have a convention deadlock where no one gets a majority. Why would you not want your candidate to do everything legal to sway the delegates to his side on the second ballot?
Too bad he can’t get the voters to vote for him!