Doctors said the a la carte approach to vaccination spelled out in Trump’s executive order would harm families, rather than help. Trump’s vaccine order likely to face challengesNext, the order is likely to be challenged. The President can direct CDC to convene ACIP and consider these changes, but an Executive Order is not a substitute to that process,” Reiss said in an email. “What this particular executive order does is, on behalf of the president, recognizes the gold standard science for the United States government. The executive order draws its recommendations from a January review that compared the childhood vaccine schedule in the US with those of other developed countries.