I can't imagine many are left on the RFK Bandaid Wagon. My guess is that of those who remain, most either 1) won't vote; 2) will write in someone; or 3) choose another third-party candidate. Trump will likely inherit maybe 10% of whatever's left. It's not nothing but it's pretty damn close to nothing.Trump has evened it up in the betting markets in the last few days and this is the only possible reason why.
That said, I can’t imagine a Kennedy endorsement actually helps Trump in any material way.