Thanks for asking. Twitter, of course, does not lend itself to full citations.— Neil deGrasse Tyson (@neiltyson) August 31, 2021
I derived the number from published COVID-19 death rates of unvaccinated people (about 1,000 per day). And from the polls that show 25% of Republican voters are unvaccinated, versus 5% of Democrats.
And because twitter did what twitter does, Tyson soon deleted the original tweet:
FYI: Deleted the Republican-Democrat COVID tweet. Was causing too many unintended Twitter fights.— Neil deGrasse Tyson (@neiltyson) September 2, 2021
In any case, imagine for a moment that Tyson is correct. That means Republicans are losing about 6000 net voters every 10 days -- and that is mostly in red counties (which have much lower vaccination rates) according to this health-care blogger who uses county-level data from Johns Hopkins (omitting Nebraska and Florida because they are not reporting this data):
new COVID-19 case rates are now running more than 68% higher in Red counties than in Blue counties, while new COVID-19 death rates are now running nearly 2.2x higher in Red counties.
If Tyson is correct and the 6000 per 10 day figure held for a year, that would amount to a bit more than 200,000 net fewer Republican voters in mostly red counties. Would that have electoral consequences as the US enters the mid-term elections next fall?