1910 United States census in the context of "64th United States Congress"

The Great Migration, sometimes known as the Great Northward Migration or the Black Migration, was the movement of five million African Americans out of the rural Southern United States to the urban Northeast, Midwest, and West between 1910 and 1970. It was substantially caused by poor economic and social conditions due to prevalent racial segregation and discrimination in the Southern states where Jim Crow laws were upheld. In particular, continued lynchings motivated a portion of the migrants, as African Americans searched for social reprieve. The historic change brought by the migration was amplified because the migrants, for the most part, moved to the then-largest cities in the United States (New York City, Chicago, Los Angeles, San Francisco, Philadelphia, Detroit, Cleveland, and Washington, D.C.) at a time when those cities had a central cultural, social, political, and economic influence over the United States; there, African Americans established culturally influential communities of their own. According to Isabel Wilkerson, despite the losses they felt leaving their homes in the South, and despite the barriers that the migrants faced in their new homes, the migration was an act of individual and collective agency, which changed the course of American history, a "declaration of independence" that was written by their actions.

From the earliest U.S. population statistics in 1780 until 1910, more than 90% of the African-American population lived in the American South, making up the majority of the population in three Southern states, namely Louisiana (until about 1890), South Carolina (until the 1920s), and Mississippi (until the 1930s). But by the end of the Great Migration, just over half of the African-American population lived in the South, while a little less than half lived in the North and West. Moreover, the African-American population had become highly urbanized. In 1900, only one-fifth of African Americans in the South were living in urban areas. By 1960, half of the African Americans in the South lived in urban areas, and by 1970, more than 80% of African Americans nationwide lived in cities. In 1991, Nicholas Lemann wrote:

The Immigration Act of 1924, or Johnson–Reed Act, (Pub. L. 68–139, 43 Stat. 153, enacted May 26, 1924), was a United States federal law that prevented immigration from Asia and set quotas on the number of immigrants from Eastern and Southern Europe. It also authorized the creation of the country's first formal border control service, the U.S. Border Patrol, and established a "consular control system" that allowed entry only to those who first obtained a visa from a U.S. consulate abroad.

The 1924 act was passed due to growing public and political concerns about the country's fast-changing social and demographic landscape. It replaced earlier legislation by significantly reducing immigration from countries outside the Western Hemisphere. Immigrants from Asia were banned, and the total annual immigration quota for the rest of the world was capped at 165,000—an 80% reduction of the yearly average before 1914. The act temporarily reduced the annual quota of any nationality from 3% of their 1910 population, per the Emergency Quota Act of 1921, to 2% as recorded in the 1890 census; a new quota was implemented in 1927, based on each nationality's share of the total U.S. population in the 1920 census, which would govern U.S. immigration policy until 1965.

The 65th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1917, to March 4, 1919, during the fifth and sixth years of Woodrow Wilson's presidency. The apportionment of seats in this House of Representatives was based on the 1910 United States census.

The Senate maintained a Democratic majority. In the House, the Republicans had actually won a plurality, but as the Progressives and Socialist Representative Meyer London caucused with the Democrats, this gave them the operational majority of the nearly evenly divided chamber, thus giving the Democrats full control of Congress, and along with President Wilson maintaining an overall federal government trifecta.

The Emergency Quota Act, also known as the Emergency Immigration Act of 1921, the Immigration Restriction Act of 1921, the Per Centum Law, and the Johnson Quota Act (ch. 8, 42 Stat. 5 of May 19, 1921), was formulated mainly in response to the large influx of Southern and Eastern Europeans and restricted their immigration to the United States. Although intended as temporary legislation, it "proved, in the long run, the most important turning-point in American immigration policy" because it added two new features to American immigration law: numerical limits on immigration and the use of a quota system for establishing those limits, which came to be known as the National Origins Formula.

The Emergency Quota Act restricted the number of immigrants admitted from any country annually to 3% of the number of residents from that country living in the United States as of the 1910 Census. That meant that people from Northern and Western Europe had a higher quota and were more likely to be admitted to the US than those from Eastern or Southern Europe or from non-European countries.

The 63rd United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1913, to March 4, 1915, during the first two years of Woodrow Wilson's presidency. The apportionment of seats in the House of Representatives was based on the 1910 United States census.

The Democrats had greatly increased their majority in the House, and won control of the Senate, giving them full control of Congress for the first time since the 53rd Congress in 1893. With Woodrow Wilson being sworn in as president on March 4, 1913, this gave the Democrats an overall federal government trifecta - also for the first time since the 53rd Congress.