Donald Trump vowed at a rally Tuesday that if reelected, hell cut funding to every school with a vaccine mandate even though all 50 states have such laws on the books.

I will not give one penny to any school that has a vaccine mandate or a mask mandate, he declared at his rally in Racine, Wisconsin. The crowd went wild.

Its a promise hes made several times in recent months, repeating the same line verbatim at rallies in March and May .

If he followed through on that, no school in the United States would receive federal funding. All 50 states and Washington, D.C., have laws requiring specific vaccines for students, including measles, rubella, chickenpox, tetanus, pertussis and polio. Exemptions to the rule vary by state, with California, New York and a handful of other states maintaining the strictest mandates.

Public health experts credit those vaccine requirements with eradicating diseases that once killed thousands of people a year. Polio, a disease that infected, paralyzed or killed nearly 60,000 American children in 1952 alone, has been completely wiped out in the U.S. thanks to mass vaccination programs.