No, 2020 was unique in that in the general election, there was little talk of American ventures overseas. A product of that is Bernie Sanders losing in the primary and there being more attention-raising issues with Covid and the protests, but the fact that both candidates advancing to the GE are very much not anti-war is something as well.
How is Bernie losing a product of voter sentiment on our overseas ventures? Both of his primary runs had little spotlight on foreign policy.
I think it's more the Democratic Party as a whole (And the GOP, gradually so) putting less emphasis on foreign policy over the last few years.
Sanders definitely didn't campaign on his own foreign policy agenda, but he did criticize Clinton's vote for the Iraq War frequently in 2016. Not so much in a 'Clinton has bad foreign policy ideas' sort of way, but in a 'Clinton has a track record of making poor decisions and siding with Republicans' sort of way.
