Many senior Democrats were calling on Biden to resign long before he got covid, but he repeatedly made defiant announcements that he would never resign (and Harris supported him). He’s the guy who said that he would only resign if God told him to! His covid infection appears to have been mild (lasting less than a week), and he resigned not because of it but because pretty much the entire Democratic establishment (led by Pelosi) told him that he must.
What fraction is under 18? It’s hard to tell by looking at the graph. I want to calculate what ratio of combatants to civilians killed a number of 70% implies.