A NDA is a contract regardless of who it is with, even more so in this
case because there are demonstrable "consideration" given to the parties
involved.
My understanding is that Cohen's NDA was so poorly written and executed,
it likely is meaningless.
I am sure that will be litigated but I assumed these things were a
fairly mature legal concept and pretty much boiler plate.
I said before, this may threaten NDAs everywhere.