President Donald Trump's nominee to lead the Centers for Disease Control and Prevention has cleared a hurdle in the Senate. A committee on Thursday sent to the full Senate the nomination of Dr. Erica Schwartz to be director of the nation's top public health agency. Schwartz appeared to be on shaky ground after a hearing this month when she faced questions about whether she'd be willing to stand up to Health Secretary Robert F. Kennedy Jr. if he ordered CDC to do something unsupported by science and good public health practice. Public health experts cautiously support Schwartz, noting her qualifications and potential to rebuild the agency.