Charles Sumner in the context of "Civil Rights Act of 1964"

The Free Soil Party, also called the Free Democratic Party or the Free Democracy, was a political party in the United States from 1848 to 1854, when it merged into the Republican Party. The party was focused on opposing the expansion of slavery into the western territories of the United States. The 1848 presidential election took place in the aftermath of the Mexican–American War and debates over the extension of slavery into the Mexican Cession. After the Whig Party and the Democratic Party nominated presidential candidates who were unwilling to rule out the extension of slavery into the Mexican Cession, anti-slavery Democrats and Whigs joined with members of the Liberty Party (an abolitionist political party) to form the new Free Soil Party. Running as the Free Soil presidential candidate, former President Martin Van Buren won 10.1 percent of the popular vote, the strongest popular vote performance by a third party up to that point in U.S. history.

Though Van Buren and many other Free Soil supporters rejoined the Democrats or the Whigs after the 1848 election, Free Soilers retained a presence in Congress over the next six years. Led by Salmon P. Chase of Ohio, John P. Hale of New Hampshire, and Charles Sumner of Massachusetts, the Free Soilers strongly opposed the Compromise of 1850, which temporarily settled the issue of slavery in the Mexican Cession. Hale ran as the party's presidential candidate in the 1852 presidential election, taking just under five percent of the vote. The 1854 Kansas–Nebraska Act repealed the long-standing Missouri Compromise and outraged many Northerners, contributing to the collapse of the Whigs and spurring the creation of a new, broad-based anti-slavery Republican Party. Most Free Soilers joined the Republican Party, which emerged as the dominant political party in the United States in the Third Party System (1856–1894).

The Civil Rights Act of 1875, sometimes called the Enforcement Act or the Force Act, was a United States federal law enacted during the Reconstruction era in response to civil rights violations against African Americans. The bill was passed by the 43rd United States Congress and signed into law by President Ulysses S. Grant on March 1, 1875. The act was designed to "protect all citizens in their civil and legal rights", providing for equal treatment in public accommodations and public transportation and prohibiting exclusion from jury service. It was originally drafted by Senator Charles Sumner in 1870, but was not passed until shortly after Sumner's death in 1875. The law was not effectively enforced, partly because President Grant had favored different measures to help him suppress election-related violence against blacks and Republicans in the Southern United States.