Article One, Section Eight of the United States Constitution grants the United States Congress "exclusive jurisdiction" over the city. The district did not have an elected local government until the passage of the 1973 Home Rule Act. The Act devolved certain Congressional powers to an elected mayor and the thirteen-member Council of the District of Columbia. However, Congress retains the right to review and overturn laws created by the council and intervene in local affairs. Washington, D.C., is overwhelmingly Democratic, having voted for the Democratic presidential candidate solidly since it was granted electoral votes in 1964.