It's because Congress passed a law, called the Arbitration Act, allow explicitly allowing it. https://www.law.cornell.edu/uscode/text/9/2 https://www.law.cornel

It's because Congress passed a law, called the Arbitration Act, allow explicitly allowing it. https://www.law.cornell.edu/uscode/text/9/2 https://www.law.cornell.edu/uscode/text/9/2