Immigration is a pretty hotly debated topic at the minute all around the world, but is it more controversial in the USA than just about anywhere else.
Since the election of Donald Trump, the issue has been on the menu at just about every political debate that takes place.
The Donald is not a big fan, he wants to reduce immigration into the country and remove those from the country who are there illegally.
It's easy to forget, but the First Lady of the United States, Melania Trump is an immigrant from Slovenia, and people are starting to wonder exactly how she managed to get her permission to stay in the country.
Way back in 1998 she was called Melania Knauss and she was a model living in New York. She had just started dating the future president at that stage and that meant that she began the process of applying for a visa to stay in America.
So far, so normal, right? But what is bizarre is that she managed to get a special type of visa that is known as an Einstein visa.
She applied for an EB-1 visa, which is supposed to be reserved for people who are at the very top of their industry - think Olympic champions and Nobel Prize winning scientists.
Now, Melania was a working model but she wasn't exactly a supermodel who was on top of the whole world.
This has led some people to question how she managed to get hold of the visa and her green card (which she received in 2006) through this programme.
Susan McFadden, a US Visa lawyer told the BBC: "You do not have to be a Nobel Prize winner to get the extraordinary ability visa. I've gotten EB-1 visas for people you've never heard of and never will,"
"An experienced lawyer knows what the US citizenship and immigration services is looking for, and how to bring out of the client's background things that will be attractive to the agency."
OK, so having a great legal team will help you out - but still, Melania doesn't appear to have the specialist qualities that would qualify her for this kind of special treatment.
This is where some people think that Donald Trump comes into the equation.
McFadden continued: "It's about getting testimonials from someone who is extraordinary in their own right and has some name recognition, but who can also attest to specific achievements of the applicant.
"And I'm sure she probably had some pretty significant letters, maybe from Donald Trump."
Ah. There we go. Although it should be said, letters from celebrities doesn't guarantee you citizenship, we can probably start to form a picture of things went down.