Or a decade or more: https://abcnews.go.com/Health/people-coronavirus-dying-10-ye...
Whatever their "logic" was the virus has been killing many more republicans than democrats for some time. https://www.nbcnewyork.com/news/national-international/study...
It's not difficult to find expected deaths vs actual deaths in 2020, but I've been on the internet long enough to know that someone who laces their post with conservative buzzwords, aka someone who hasn't learned themselves into their position, will have no interest in learning anything they disagree with.
2020 had the largest mortality spike in 100 years and 15-20% more deaths than expected, despite a lockdown which would reduce some accidental death rate such as car accidents.
But I'm making this post for people who care about reality, not for you.
But you are correct, it's cumulative, so without Covid you'd expect max ~100,000 more deaths per year (aging population), so the baseline would be
2019 - 2.8M (+0 excess deaths)
2020 - 2.9M (+500k excess deaths)
2021 - 3.0M (+400k excess deaths)
So 900k.
Sounds like a lot, but over 2 years, you'd expect more than 6 million Americans to die from all causes (you can work that out easily from an ~80 year life expectancy and 300+ million Americans). A significant fraction of those who would die anyway, will die with Covid and be counted in that 1 million. Tell me the excess deaths as a percentage, and anything under 50% excess deaths isn't really going to do that much to the economy.
Oh, and then the surge in excess deaths is followed by a fall (of less than that X% for sure). Bringing the deaths of the sickest Americans forward by about a year is actually going to improve the economy, in all likelihood.
Anyway, the "million Americans dead from Covid" statement is nearly always divorced from the context of "3 million Americans die every year".