They wouldn't dare do that to a Kennedy... again... would they?
Honestly though, I don't know where you get traction as a legacy Kennedy in the modern Democrat party. Maybe it gets you news coverage, and the donor core is interested in stability, but the activist core is pretty damned socialist now and they were not pleased that they had to swallow an old straight white guy in Biden.
Yeah, no way RFK gets the nomination, but in losing a nomination fight he makes a decent showing in, he can go indy or 3rd party, which, I suspect, is what he is planning.
If/When the media pivots on the covid vaccines, and starts zeroing in on all the vaccine injuries, and how Trump ordered all the vaxes before the first test was even run on them, he will get more than enough traction.