Senator Rand Paul said the committee he leads would vote next week on whether to hold Dr. Fauci in contempt of Congress.

In an all-day hearing, the agency’s scientists argued against allowing broad access to unproven drugs that the agency had banned three years ago.

Democrats and Republicans are haggling about the Clarity Act, a major bill pushed by the crypto industry, as it moves closer to a Senate vote.

Researchers relied on a newer gene-editing technique that may make it possible to engineer embryos, a prospect that has long alarmed bioethicists.

The babies were part of a vaccine trial for a respiratory virus in the 1960s and died shortly after. Their families said they had been unaware of the trial until recently.