The reference to Senator Pocahontas Warren was an inside joke, known by the Navajo Indians. Trump made it to contrast the native American soldiers, who helped their country win a war, with the self serving Democrat, how claimed native American status to get into Harvard, based on the quota system. Those being honored, were not there because of a quota system, but because of skill and courage. This is unlike Senator Warren. CNN is doing damage control for the Democrats and for Warren, trying to take everyone's eye off the ball.
The label of Pocahontas was first coined by Boston AM 680 radio personality, Howie Carr, during Warren's first run for Senate in Massachusetts. Warren claimed her grandmother told her she was part indian when she was a child. She never checked this out for verification. Instead she used this anecdotal evidence to get into Harvard, by checking the native American box on her application. She was a scammer and knew this would give her a back door entry, based on quotas.
This claim, while she was running for senate, made the local Indian tribes, as well as the Navajo leaders, upset. These tribes keep good genealogy records and there was no record of her in their books, to support her claim. Instead of apologizing, she doubled down. This made the local indians feel that whitey once again screwed them out of an educational slot. Because she was a Democrat and cheating is normal for them, she got a pass in Liberal Massachusetts and was elected. The Navajo Indians honored. were aware of her scam, based on the genealogy check years back, making this an inside joke about the swamp.