Charles A. Beard,
History of the United States — XIV
(1921)
“ Not content with this, the law went on to declare the Missouri Compromise null and void as being inconsistent with the principle of non-intervention by Congress with slavery in the states and territories. Thus by a single blow the very heart of the continent, dedicated to freedom by solemn agreement, was thrown open to slavery. A desperate struggle between slave owners and the advocates of freedom was the outcome in Kansas.If Douglas fancied that the North would receive the overthrow of the Missouri Compromise in the same temper that it greeted Clay's settlement, he was rapidly disillusioned. ”
