"We hold ... that on their separation from the Crown of Great Britain, the
several colonies became free and independent States, each enjoying the sepa-
rate and independent right of self-government; and that no authority can be
exercised over them ... but by their consent ... It is equally true, that the
Constitution of the United States is a compact formed between the several
States . . . that the government created by it is a joint agency of the States,
appointed to execute the powers enumerated and granted by that instrument;
that all its acts not intentionally authorized are of themselves essentially null
and void, and that the States have the right . . . to pronounce, in the last resort,
authoritative judgment on the usurpations of the Federal Government . . . Such
we deem to be inherent rights of the States."
-John C. Calhoun, statement adopted by a convention
in South Carolina, 1832
Which of the following was the immediate cause of the publication of the
statement in this excerpt?