They wanted to signal the agents that there is plenty of damning evidence of an affair, so that the agents would know not to lie to protect Clinton.
They didn't want agents to know that damning evidence of an affair had been found.
mnli hypothesis: They didn't want agents to know that damning evidence of an affair had been found. premise: They wanted to signal the agents that there is plenty of damning evidence of an affair, so that the agents would know not to lie to protect Clinton.