JD Vance, Trump’s running mate, told NBC News in an interview that “there’s been a lot of communication back and forth” between the two campaigns.
Robert F. Kennedy Jr. intends to end his independent presidential campaign and endorse former President Donald Trump, according to two sources familiar with the plans.
From watching and reading independent journalists, owner-class media, and more, it seems, IIRC, a good amount of his supporters are for Trump.
It would help third parties if they left the duopoly, though.
https://www.nbcnews.com/politics/2024-election/rfk-jrs-exit-help-trump-according-polls-rcna167539