Actually, you have to understand the nuance here. Trump uses the teleprompter when he is delivering a policy speech prepared in advance instead of his usual ad lib stump speeches. Adding the fact of his using the teleprompter gives what he said more gravitas.
Please, don't use that horsesh*t word. Never heard it before the 2000 election, when Gore was said to have more "gravitas" than Bush. Suddenly, every media buttwipe on the planet was using it.