It’s estimated by the census bureau that the US grew around 3M (that’s pretty small) between 2016 and 2019.
Curious case of 40M people materializing from oblivion if true.
In 2018’s mid term election there were 228,832,000 citizens of voting age. There were 153,066,000 citizens who were registered to vote. A massive Democrat voter registration drive is underway,
https://www2.census.gov/programs-surveys/cps/tables/p20/583/table01.xlsx