The Senate health committee announced Thursday morning that it was canceling a planned hearing on Weldon's nomination because of the withdrawal.
A person familiar with the matter, who spoke on the condition of anonymity to discuss internal deliberations, said the White House pulled the nomination because it became clear Weldon did not have the votes for confirmation.
Weldon was considered to be closely aligned with Robert F. Kennedy Jr., the U.S. health secretary who for years has been one of the nation’s leading skeptics on the need for some vaccines.
A former Florida congressman, Weldon also has been a prominent critic of vaccines and the CDC, which promotes vaccines and monitors their safety.
