“Then why did that secret service agent not admit restraining her? Trump has said the secret service told him they didn’t see anything happen to her.”
Probably because none of the agents noticed their interaction with Fields due to the crush of people around Trump. I suspect Fields was grabbed by the arm by one of the Secret Service agents or someone else other than Lewandowski, but we cannot know that for sure either. Fields has a past history of making false claims against a number of other officials such as West. For all we know she could have cooked up a scheme and bruised her own arm to make it look good. I doubt that she did, but her past reputation makes it conceivable. In any case, look carefully at the haircuts and the shirts. At present the man I saw in the videos could not have been Lewandowski, and we know the Washington Post reporter flat out lied and then deleted his post to hide the evidence of his lie. Furthermore, whatever did happen was so minor and trivial, Fields should be ashamed of herself for even mentioning such a trivial affair, much less try to smear a political campaign with such trumped up charges.
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Are you sure about that? I'm not aware of anyone proving or even suing her for defamation. You seem to be jumping to quite a number of unsupported conclusions to defend a man (Trump) who called his supporters "poorly educated".