Actually the most recent poll with everyone in shows Kennedy with 13% of the vote(!). Most of that coming from Trump. Biden already hitting him hard. Trump ignoring RFK because he’s pretty busy right now. I suspect that people are kicking the tires on RFK and as you mentioned support will consolidate around Biden. Yet again this election shows we need to ditch the two party system and go to a parliamentary system. https://thehill.com/homenews/campaign/4610416-rfk-jr-hurts-trumps-election-chances-more-than-biden-poll/