Donald Trump’s in-laws may have benefited from the “chain migration” process that he believes endangers Americans and wants to restrict, experts have said.

Viktor and Amalija Knavs, the parents of Mr Trump’s wife Melania, moved to America from Slovenia and now reportedly have immigration green cards.

There are two main ways that could have been achieved, according to a lawyer who talked to The Washington Post - sponsorship from their daughter or an employer.

The latter was unlikely, according to Matthew Kolken, a partner at a New York immigration law firm, since they would have been made to provide evidence they could do a job no other American could.

Mr Knavs, 73, reportedly worked as a chauffeur and car salesman while Mrs Knavs, 71, was a pattern maker at a textiles factory, according to the Washington Post.

Both are now believed to be retired. It is unclear exactly how and when the pair moved to America, but a lawyer speaking for them told The Washington Post they are now living legally in the US.