I have to see more of RFK Jr. before I jump onboard. He's a life-long liberal and environmentalist - I think he may be running an unorthodox campaign where he pretends to be moderate and then moves to the left.
We shall see. I'm not sure that's an effective strategy to win the primary - Biden only won because he was viewed - correctly - as the only one who could beat Trump. But if Dems are looking for someone else...well, maybe they think RFK Jr. is the guy to beat Trump and Biden can't. But I'm not sure the left wing of that party will support another moderate. They'll never vote Repub, but they aren't turning out for Biden, especially in the primaries.