 During the same election Arizona finally passed a referendum, which McCain supported,
enabling the state Martin Luther King Jr. holiday.McCain was a co-sponsor of the Agent Orange Act of 1991, which enabled disability benefits for Vietnam veterans afflicted with Agent Orange-related diseases and established periodic scientific reviews to determine what levels of exposure and diseases would be covered.In January 1993, McCain was named chairman of the board of directors of the International Republican Institute, a non-profit democracy-promotion organization with informal ties to the Republican party.