Particularly notable was an incident at the April 13, 1830 Jefferson Day dinner, involving after-dinner toasts. Robert Hayne began by toasting to "The Union of the States, and the Sovereignty of the States." Jackson then rose, and in a booming voice added "Our federal Union: It must be preserved!" – a clear challenge to Calhoun. Calhoun clarified his position by responding "The Union: Next to our Liberty, the most dear...