RFK Jr. sizes up Trump in earlier comments before endorsement
A mobile billboard sponsored by MoveOn.org displays Robert F. Kennedy Jr.'s insults about Trump before his endorsement. The truck drove around Phoenix during Trump and RFK Jr.'s mutual lovefest at a rally Friday in nearby Glendale. John Medina for MoveOn/Getty Images

What a difference a few weeks makes.

RFK Jr. slammed Donald Trump just last month as "probably a sociopath," a "terrible human being," and the "worst president ever and barely human" during the Republican National Convention in text messages obtained by The New Yorker .

He has also referred to Trump as "unhinged."

Now he's endorsing him.

A mobile billboard truck sponsored by the anti-Trump MoveOn organization plastered with Kennedy's comments about the former president drove around Phoenix Friday during Trump's campaign rally in the suburb of Glendale, Arizona. That's when Trump welcomed RFK Jr. to the stage, heaped praise on him, and said his late dad and uncle JFK were "looking down" on him with pride.

Just last month Kennedy insisted Trump's pick of JD Vance as his running mate was a "salute" to the American military industrial complex, adding: "Their gravy train is going to continue."

Trump has in turn has blasted Kennedy as a "radical left lunatic" and a "plant" from the left to help then-candidate Joe Biden get reelected.

But none of that acrimony emerged in Trump and Kennedy's new partnership debut.

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