One place I read was Wictor, about 1 year ago or more? - he researched and found that the academy Trump went to was one of 3 schools that taught Russian, and he had some kind of evidence. I may be able to find that thread of his.
thanks. don’t go to far out of the way for it. I’ve got 8 different books on Pres. Trump - some biographies and some hit pieces. None of them even mention a whiff of Pres. Trump speaking or understanding Russian.