Republican senator airs concerns about supporting RFK Jr to be US health secretary

WASHINGTON — A key Republican senator on Thursday said he was struggling with Robert F. Kennedy Jr.'s nomination by President Donald Trump to run the top U.S. health agency, saying he had reservations about the nominee's "misleading arguments" on vaccines.    "Your past of undermining confidence in vaccines with unfounded or misleading arguments concerns me," Republican Senator Bill Cassidy, a physician from Louisiana, told Kennedy.  "I have been struggling with the nomination," he...