Have you seen the video??? He DOES say it....
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I have seen over ten examples.... he’s wearing an earpiece like the Secret Service.
He corrected himself in unnatural ways on the campaign and his expression would flash ... he was being corrected the whole way.
It’s 100% clear.
It does sound like that is what he said. The word Marines is plan as day. Regardless, he did not salute. That in itself shameful.