Prince Harry and Meghan reportedly want former president Barack Obama and his wife Michelle to attend their wedding.
Government officials are worried, however, that President Trump will take great offence if he is not invited as well.
Meghan branded the billionaire as “divisive” and “misogynistic” last year.
The future royal is also believed to be a fan of Hillary Clinton, who Trump defeated in the US Presidential Election.
Trump will stop US-UK Brexit deal if he is not invited to Royal Wedding
In an interview with the Mail on Sunday, the political writer also said: “He doesn’t like being snubbed and wants to be the centre of attention all the time.
“Trump’s foreign policy doctrine is simple: you Brits suck up to him and enlist in whatever geopolitical fantasy he has going, he’ll give you what you want – though only if it doesn’t hurt him.
“It is not so much vengeance, rather ‘you flatter me and I’ll flatter you’.”
Mr Wolff also revealed that Trump “had no idea what Brexit was” two weeks before the referendum back in 2016.