This Bloomberg article, written by Justin Sink, accounts for each of the Trump associates which are now helping to build a case against the President. Interestingly, included among their numbers is Allen Weisselberg, the chief financial officer of the Trump Organization. Information from Weisselberg could prove especially threatening to Trump.  He has been the C.F.O of the Trump Organization for years,  has worked with the Trump family in some capacity since 1970, serves as treasurer to President Trump’s personal foundation, and is the only non-family member that serves as a trustee to the trust that owns the Trump Organizations business interests. This is significant, because investigators have been previously unable to access Trump’s financial records. Now they have the next best thing. Weisselberg, with his intimate knowledge of the President’s finances, could provide the information previously sought from the records, such as evidence of Russian dealings or violations of the foreign emoluments clause. Even if this information is not sufficient to build a case, it could very well be sufficient enough to get a subpoena for the President’s records.

The Wall  Street Journal