Executives with the drugmakers Pfizer and Moderna have declined an invitation to meet at the White House today for what President Trump is billing as a “vaccine summit.” The event appears to be an effort by Trump to pressure the Food and Drug Administration to rapidly approve the drug companies’ COVID-19 vaccines. The FDA is currently reviewing data from Pfizer’s clinical trials and could allow emergency use of its vaccine by the end of the week.

This comes as The New York Times reports the Trump administration turned down an offer by Pfizer last summer to lock in supplies of its coronavirus vaccine, giving other countries a chance to get in line ahead of the U.S. for the drug’s limited initial supply.