Never underestimate the name Kennedy on a ballot. (It's what I heard saying...)
Polls don't mean a lot but it's often the only measure we have. RFK is currently around 8.7% and has been mostly unchanged since April. Perot hit 19%, which I believe was the best performance from an independent since 1912. RFK's best shot is to somehow wrestle the DNC nomination from Kamala. He does that, and odds change REAL fast.
As my favorite macro guy always says: Let's watch!