Kansas–Nebraska Act
With the abolitionist movement gaining momentum, defenders of slavery such as John Randolph and John C. Calhoun found it necessary to argue that the Declaration's assertion that "all men are created equal" was false, or at least that it did not apply to black people. During the debate over the Kansas–Nebraska Act in 1853, for example, Senator John Pettit of Indiana argued that the statement "all men are created equal" was not a "self-evident truth" but a "self-evident lie". Opponents of the Kansas–Nebraska Act, including Salmon P. Chase and Benjamin Wade, defended the Declaration and what they saw as its antislavery principles.