No, the convention is NOT united behind Il Duce!
Nearly 30% if them- including half of the delegates not pledged to him- have reservations about Trump. And 10% say that while they will be voting for the rest of the Republican ticket, they will not be voting for Trump and Pence.
Add that to a candidate who barely has a staff, is running out of money, and doesn't see the necessity of a "ground game" because he's so awesome, and you have a campaign in trouble- even before you get to that 70% negative rating from the voters (Hillary's is 55% negative).
At least Trump can take comfort in the knowledge that a greater percentage of the delegates plan to vote for him than of the rank-and-file. I suspect the percentage of the latter who are planning to stay home or vote for somebody else is by now lower than the 30% who expressed that intention back during the primaries. But with all the problems the Trump candidacy has, he can't afford his continuing unpopularity with his own party.