Before revision:  This paper studies ambiguous persuasion when the receiver' s goal is to maximize his ex-ante payoff. First of all , if the receiver is dynamically consistent, I show the sender cannot make any profits more than Bayesian persuasion.
After revision:  This result is obtained when both players' preferences are represented by the Maxmin Expected Utility (MEU) criterion. However , if the receiver is dynamically consistent, I show the sender cannot make any profits more than Bayesian persuasion.