He backtracked quickly from that. Here are couple of articles that talk about it.
https://theconservativetreehouse.com/blog/2024/08/15/robert-kennedy-jr-today-denies-what-robert-kennedy-jr-said-yesterday/
Today, realizing that core story essentially destroys his credibility, usefulness within the IC operation around him, Robert Kennedy Jr denies reaching out to the Kamala Harris campaign.
Let all of this soak in, because we rarely get to see this level of obtuse dissonance happening in real time. This is what happens within Intelligence Operations that are carried out through the media.
Everything around RFK Jr is designed to hurt Donald Trump and elevate the non-Trump status quo within politics. Some people are really gullible for it (Team Flynn and Team DeSantis supporters specifically); however, I am cautiously optimistic that more people are awake and able to see it now as it unfolds.
https://theconservativetreehouse.com/blog/2024/08/18/the-very-practical-reason-brian-fallon-rejected-rfk-jr-from-kamala-harris-camp/
Prior to the switching of Biden with Harris, RFK Jr was polling around 8 to 12% in most commonly accepted polling results. After Kamala Harris replaced Joe Biden, RFK Jr ballot support dropped to around 4 to 6%. The reason was simple, the democrats supporting RFK Jr, disenfranchised with Biden, returned once he was replaced.
The current 4 to 6% support that remains with Robert Kennedy Jr are never-MAGA republicans, single issue vaxx voters and never-Trumpers. Why would Fallon want to interrupt that convenient fracture?
So long as the GOPe voters have an alternative, Kamala is in a good place. The campaign of Kamala benefits from RFK Jr wandering around the landscape of tenuous republicans herding potential Trump ballots into a convenient RFK Jr vote shredder. Fallon doesn’t want Kennedy to stop this process.
It is genuinely amazing how many astute political observers cannot see this dynamic playing out in real time. The political gravity of Robert F Kennedy is apparently so strong, there are many republican ballots vulnerable to it.