The American Enterprise Institute is anti-Trump?
It was/is made up of Neocons who got us into Iraq which Trump opposed. It's made up of traditional anti-Trump Republicans. Trump, a non-politican, and non-Republican, was always an outsider. They never forgave him for taking out Bush in the nomination process embarrassing him as he only got 3% of the vote after spending $100 million.
It includes as it members some of the most anti-Trump people including Lynn Cheney, the Bushes, John Bolton, Dick Cheney. They always considered Trump an outsider and "winked" at his problems with the false charges of collusion. It was the Bushes that started the original Russian dossier against Trump. Hillary Clinton took it over when Bush dropped out of the campaign for the Republican nomination against Trump.
To sum up, the AEI is no friend of Donald Trump. If they were, why would they even do a poll to come up with results that might embarrass a Republican president? No, they deliberately went out of their way to help defeat Trump just as they used the dossier in 2016.