She will likely meet with several of President Trump’s top team members. Wisely, I assume that she wants to be square in the middle of the rising nationalist (as opposed to internationalist) movements in Europe and the US.
This being said, it is next to impossible for them to communicate at a distance without both their governments and opposition monitoring the heck out of them, with the intention to undermine and hurt them both. I would not put it past either government to even try to waylay a courier carrying documents.
So it has to be done in person, if not face to face. This is because neither wants a meeting between them to be used as propaganda against them either. Again, smart move.
Melania as translator.