It was the first contested American presidential election, the first presidential election in which political parties played a dominant role, and the only presidential election in which a president and vice president were elected from opposing tickets.
In Miranda v. Arizona, the Supreme Court ruled that detained criminal suspects, prior to police questioning, must be informed of their constitutional right to an attorney and against self-incrimination.
Vermont is the first of the thirteen colonies to abolish slavery and enfranchise all adult males. New York enfranchises all free propertied men regardless of color or prior servitude.