https://thinkprogress.org/trump-requires-volunteers-sign-nondisclosure-agreement-bb240eb080f6#.k1xc2oey9
"Corey Lewandowski is a CNN contributor even though he’s subject to a nondisclosure agreement legally prohibiting him from criticizing Trump, his family, or any of his businesses. Suffice it to say Trump’s former campaign manager has lived up to his end of the bargain — Lewandowski basically serves as a paid Trump campaign source during his CNN appearances. On the other side of the spectrum, Trump recently filed a $10 million lawsuit against former senior campaign consultant Sam Nunberg for allegedly violating that same NDA."