day today. with or without that threat, the fda's authorization is expecting soon after the vaccine was endorsed by the advisory panel as we came on the air last night. fda scientists are taking care to craft directions for doctors across this country, especially about vaccinating patients with severe allergies and pregnant women and teenagers. and after that final green light comes, the vaccine will be rolling out of this pfizer plant in michigan and the first americans could get those shots by monday or tuesday. tonight, the staggering toll -- more than 294,000 lives lost. that's already more than all the combat deaths from world war ii. abc's alex perez tonight outside that pfizer plant near kalamazoo in michigan. >> reporter: tonight, with the fda expected to greenlight the first coronavirus vaccine at any moment, the president threatening the fda commissioner. sources tell abc news white house chief of staff mark meadows suggested to dr. stephen hahn in a phone call