But today, the Republican presidential candidate will enter unfamiliar territory, even by his larger-than-life standards, when British MPs hold a parliamentary debate over a petition calling for the USA businessman-turned-politician to be banned from the country.
It's about to start: at 4:30 p.m.in London (8:30 a.m. Pacific Time), Britain's Parliament will debate whether Donald Trump should be banned from the United Kingdom on hate-speech grounds.
Under British law any online petition backed by 100,000 people who must provide and confirm an email address must be considered for parliamentary debate.
Labour backbencher Paul Flynn, a member of the Petitions Committee, who opened the debate, defended the decision to debate the ban because the views of more than half a million Britons should not be ignored, and the public should have a say in what's debated in parliament.
Only interior minister Theresa May can issue an order banning entry into Britain and Prime Minister David Cameron has said that while Trump's comments were divisive, he does not favour barring him.
Should Donald Trump be banned from visiting the UK? "I have never heard of one for stupidity and I'm not sure we should be starting now".
If they are coming from outside the European Economic Area (the EU plus Iceland, Liechtenstein and Norway), she can ban them if she considers their presence in the United Kingdom to be non-conducive to the public good.
He said some of those who signed the petition believed that Mr Trump's comments had incited acts of violence in the US.
"If he came to visit our country, I think he would unite us all against him", he said.
Tory MP Sir Edward Leigh suggested it was unlikely Trump would be "worried" about tonight's debate and that any potential ban "would play into his hands".
He added: "I have heard of a number of cases where people have been excluded for incitement, for hatred".
Mr Trump has threatened to cancel over £700 million ($1.45 million) of investments in golf courses in Scotland if Britain slaps him with a travel ban.
Members of Parliament will also debate a counter-petition that calls for Trump not to be banned from the country. The individuals who instigated this ban have a self-serving personal agenda and do not represent the views or interests of the vast majority of British people. "Twice in two world wars it has come to our rescue and this man may conceivably become president of our most important ally".
'While I think this man is insane, while I think this man has no valid points to make, I will not be the one to silence his voice, ' said Conservative lawmaker Tom Tugendhat.
Ukip MEP David Coburn, the party's leader in Scotland, also spoke out against calls for Trump to be banned from Britain, despite branding Trump's comments "utterly ridiculous".
Labour leader Jeremy Corbyn echoed that sentiment Sunday, telling The Andrew Marr Show he thinks that Donald Trump has "weird and frankly off the wall views" but would like him to meet his Mexican wife and some of his constituents in a local mosque.
