In advance of a hearing on Wednesday expected to focus on the lab leak theory, House Republicans took aim at Dr. Anthony S. Fauci, whom they have long vowed to investigate.
An internal federal watchdog said that the health agency had not given adequate oversight to EcoHealth Alliance, which had been awarded $8 million in grants.
House Republicans are preparing a cascade of investigations, some overlapping, into the Biden administration and its policies. Right-wing lawmakers have said the ultimate goal is to impeach the president.