At least Vivek is willing to debate a Libertarian there.

Of the notable non-Libertarian speakers at LP national, this is what comes to mind first with each:

Trump: $4 trillion in COVID spending, setting in motion eventual devastating inflation that the next guy made even worse.

Vivek: His proposal for a military invasion of Mexico aimed at disrupting the cartels, rather than simply liberalizing drug and immigration policy.

RFK Jr.: He was crazy even before the brain worm thing, but his competition is so bad that I just might support him despite him being a bit nutters.

I'd like to think Libertarians can venn diagram with most people and ideologies, at least, and could benefit from acknowledging commonalities more often than they do... but these are not our people.