Which series of major party votes over the last 6 presidential elections is the most uncommon?

[Schiff for Senate]

It's probably Bush-Kerry-McCain-Obama-Clinton-Trump. Basically a voter that swings against the national trend every time. It's also a fairly incoherent voting pattern in its own right.

This is the really hard part to explain.  Are they pro- or anti-war LOL?  And the 2012 vote rules out personal animosity against Obama.

They're a liberal Arizonan who McCain won the vote of because of favourite son effect.
Or they don't even need to be Arizonan; they could just be a moderate centre-left Democrat who likes how McCain is a 'maverick.'

[Schiff for Senate]

Bush-Kerry-McCain-Romney-Trump-Trump

That's not totally farfetched.  An isolationist who will only vote for white men.

Or a conservative Massachusettser who really wants another Massachusettser as president (lazy answer, I know).

[Schiff for Senate]

It's probably Bush-Kerry-McCain-Obama-Clinton-Trump. Basically a voter that swings against the national trend every time. It's also a fairly incoherent voting pattern in its own right.

This is the really hard part to explain.  Are they pro- or anti-war LOL?  And the 2012 vote rules out personal animosity against Obama.

They're a liberal Arizonan who McCain won the vote of because of favourite son effect.
Or they don't even need to be Arizonan; they could just be a moderate centre-left Democrat who likes how McCain is a 'maverick.'

But why would someone like that vote Trump in 2020?

I was considering only the Kerry-McCain-Obama aspect of the vote, since that’s what Skill and Chance said he found especially baffling. Admittedly, my Kerry-McCain-Obama voter, given that they’re liberal, would probably go on to vote Clinton and then Biden.