You're using circular logic or missing my point entirely.

The Democrat leadership sat with Nazis because they support Zionists, who are the biggest group around promoting racial supremacy and ethnic cleansing, and even commiting a Genocide along ethnic lines, all of which are ethno-Fascist ideas, the same kind of ideology as Nazis.

Trump and the Rest of the Republicans sat with Nazis because they too support Zionist as well assupporting white supremacists (a smaller group of Nazis than Zionists and who at the moment aren't commiting Genocide, but who also have a racial supremacy and ethnic cleansing ideology, same as the Zionists and the original Nazis)

As far as I know, Trump himself has never defended racial supremacy or ethnic cleansing, so he is not directly a Nazi. However he definitely seats with Nazis, as does Joe Biden and Kamala Harris.

It has nothing to do with seating with each other since it's perfectly possible for opposing groups to both be Nazis because they both support racials supremacist ideas and ethnic cleansing or support people who support those ideas.

If sitting with Nazis makes one a Nazi then everybody who supports Zionists, white supremacists or any other kind of extreme racist political movement which believes in their own racial supremacy and sees it as a reason to violently expel or eliminate people of ethnic groups they see as inferior, is a Nazi, which would means Trump, the Republicans, Joe Biden, Kamala Harris and the Democrats are Nazis since they've been sitting with those who follow ideologies like Nazism.