WASHINGTON — Ahead of his appearance before the Senate Finance Committee on Thursday, leading Republicans in the chamber expressed frustration and questioned the decisions of Health and Human Services Secretary Robert F. Kennedy Jr. after he purged top Centers for Disease Control and Prevention leadership last week, including the Senate-confirmed CDC director Susan Monarez .

The agitation comes as north of 1,000 current and former federal health workers signed onto a letter demanding Kennedy resign, accusing him of endangering the nation’s health as he transforms government policy to better fit his long-held, often scientifically dubious views on vaccines and public health.

What You Need To Know

Ahead of his appearance before the Senate Finance Committee on Thursday, leading Repub

See Full Page