So what you're saying is that voters are stupid? Punch-drunk unable to think about the consequences of their actions?
I wouldn't say stupid, I'd say ignorant. A more progressive interpretation: you can't help someone else until you have your own mask on. People are voting based on how they feel their life is compared to 4 years ago and apparently half of america very much recalls life being better then. They don't feel the need to dig any deeper than that; they need to get their own oxygen mask on.