President Trump’s newly signed executive order focused on childhood vaccine schedules is facing some pushback. Speaking from the White House Monday,Trump said the order would split the childhood MMR vaccine — for measles, mumps, rubella — into three shots. Republican Senator Bill Cassidy, who’s a physician, called the order “wrong” in a post on X.Cassidy wrote that the “President does not have the expertise to make these changes” and that breaking up vaccines will increase hesitancy and make children less safe.