Sen. Bill Cassidy (R-La.), a doctor, said Monday that President Donald Trump “does not have the expertise” to push his newly-signed executive order breaking up the MMR vaccine ― and implored parents to listen to their child’s pediatrician instead of inaccurate orders.“Breaking up vaccines will mean children have to get more shots to get the same protection, not fewer shots,” Cassidy wrote on X. “It will increase hesitancy and make children less safe.”The Republican also shut down debunked claims by Trump and Health and Human Services Secretary Robert F. Kennedy Jr. that vaccines are tied to autism in children, calling the shots “overwhelmingly safe” and “effective.”This is a developing story. Check back for updates.RelatedDonald TrumpVaccineRobert F. Kennedy Jr.AutismBill Cassidy