Machiavelli declared that to hold on to power, a prince must act as circumstances required. a famous saying that expresses his ideas is answer quickly, do not put in 'go look it up on google' or anything that is not the answer to this question. i tried looking this up before and there was only one result with the response basically saying 'go ask a parent or guardian, then try google, and if that doesn't work, use which honestly ruins the point of this website (in my opinion). will give 5 stars and to correct answer.

In his most famous piece of work, The Prince, Niccolò Machiavelli basically wrote a manual on the types of existing principalities, poiniting out the difference between each of them, on the foundations of power and, finally, on the norms of conduct that the one who aspires to be prince must adopt.

According to the author, it was not enough to achieve power; the prince should be able to keep it, and to do so, he would have to be respected by the people, acting accordingly to each circumstance, changing strategies as appropriate. The most famous saying that synthesizes the Machiavellian though is "The ends justify the means", which means that in order to remain in the custody of power (which would be the "end"), the prince is authorized to act in the most convenient manner, not necessarily needing to stick to rigid moral principles and ethical norms.

the answer is

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;