These results confuse me. If the largest states trended against Biden (some even swung against him like FL and IL), how did the Electoral/Popular Vote gap grow? Where did he gain votes?
Turnout, and for the gap trends don't matter but swings(because trends negate changes in the popular vote making it meaningless when assessing the popular). The California swing was minimal and he massilvey boosted turnout there increasing his national popular vote margin. He also got a lot of swings in deep red states that don't help him in the EC but boost his popular vote.
WV swung towards biden.