While the District of Columbia is considered politically neutral at the time of passage in 1961, the District swung dramatically toward the Democratic Party since. African-Americans have voted in greater numbers than they had in the 1940s and 1950s. According to the 1970 census, 71% of the Federal District was black, a dramatic jump. As a result, the District has sent its 3 electoral votes to the Democratic candidate in every single presidential election since 1964. However, the District's electoral votes have yet to prove decisive in a presidential election. The smallest Electoral College majority won by a Democratic president since the Twenty-third Amendment's ratification was the 56 vote majority achieved by Jimmy Carter in 1976.