I wrote about this in here about 2 years ago
Now NBC is covering it
The information that a Russian lawyer brought to Trump Tower when she met Donald Trump Jr. in June 2016 stemmed from research conducted by Fusion GPS, the same firm that compiled the infamous Trump dossier. Natalia Veselnitskaya told NBC News she has been cooperating with the Senate Judiciary Committee, which is investigating how the Trump dossier was compiled