Donald Trump’s chief of staff, Mark Meadows, delivered an ultimatum to the head of the FDA. Approve the Pfizer vaccine by the end of the day Friday or resign. The Washington Post reports:

The threat came on the same day that President Trump tweeted that the FDA is “a big, old, slow turtle” in its handling of vaccines, while exhorting Commissioner Stephen Hahn to “get the dam vaccines out NOW.” He added: “Stop playing games and start saving lives!!!”

It also led the FDA to accelerate its timetable for clearing America’s first vaccine from Saturday morning to later Friday, according to two people familiar with the process who spoke on the condition of anonymity to discuss internal matters.

Trump has complained repeatedly that the vaccine wasn’t approved before Election Day, the Post writes, blaming it on the ‘Deep State’ inside the agency that he accused of working against his reelection. Trump was also said to be upset that Britain cleared the vaccine before the United States, although the Pfizer-BioNTech vaccine has been developed and reviewed in record time.