How did the Nullification Crisis illustrate the debate over state’s rights?

The Nullification Crisis. Calhoun's pamphlet sparked a national debate over the doctrine of nullification and its constitutionality. ... Jackson supported states' rights but viewed nullification as a prelude to secession, and he vehemently opposed any measure that could potentially break up the Union.

what are the choices?

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.