If foreigners can buy enough powerballs to win the prize when traveling in the United States, will the United States cash in the prize money?

You can buy it. Many foreigners buy regularly through friends every month, even outside the United States. On one occasion, an Australian resident group regularly bought hundreds of tickets every month and once won the first prize. A Mexican who sneaked into the United States to work as a black worker won the first prize and won a bonus. Still without American identity, he was sent back to Mexico and went home to be a local tyrant.