No, it is not OK to marry two people in the United States.
According to U.S. law, marrying two people (polygamy) is illegal. All U.S. jurisdictions prohibit polygamy by invalidating marriages involving more than two spouses. Entering into a marriage while still legally married to another person (bigamy) can lead to an annulment. An annulment, like a divorce, legally ends the marriage. Therefore, attempting to marry two people would have legal consequences.