House Democrats Subpoena Azar, Redfield For CDC Documents

The transcript discusses accusations by Democrats against the Trump administration for allegedly attempting to block or alter CDC reports on coronavirus spread. They claim there is evidence of appointees bullying the CDC. Azar and Redfield have been given a deadline of December 30th to submit relevant documents and emails.

How do the accusations against the Trump administration relate to the spread of the coronavirus?

What specific type of documents are Azar and Redfield required to turn over?