Two separate counts here - one is from Marvel Comics #1000, a big commemorative issue. Mark Waid penned a piece about Captain America's relevance in the 1940s and how it still applies today:
https://www.hollywoodreporter.com/he...-issue-1234909
Apparently telling people America isn't perfect and we should fight for a better tomorrow is too political lol.
Secondly, Art Spiegelman (of Maus fame) wrote this piece which you can read in full at the below link, but was told to censor it by Marvel:
https://www.theguardian.com/books/20...ise-of-fascism
So I'm sure all those people who wring their hands over censorship and free speech will ride to the rescue here, right?