The DP tried ther utmost to protect Biden and made it virtually impossible for Kennedy to run in the primary campaign and in te end he decided to run as an Indpendet. The Biden administration went further and refused to grant a security detail to protect him - after all his father and uncle were both assassinated.
Kennedy provided a person embodying moderate policies opposed to the far left policies Biden implemented and now Mgabe Harris wants to expand. So moderate class Democrats actually supported him.
The fact is that based on the reactionary conduct of the Democrats insofar as far-left policies are oncerned have now let to Kenendy discontuing his camapign and endorsing Trump as presidential candidate. Trump said he admires what Kenendy stood for and that may lead to Tr ump appointing him in his cabinet.
Trump himself used to be a registered Democrat and left the party beause the Democrats have gone rogue and it is apparent that Kennedy is leavng the Democrats for the same reason. Not good for the Mugabe Harris campaign