Why was Louisiana the least likely state to secede

Louisiana relied on trade with the North, which was bad and also had previously supported the abolition of slavery.  The state was supporters of states rights.  And Most voters in Louisiana had supported pro-Union candidates in the election.

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

monopolies  came to the united states with the colonial administration. the large-scale public works needed to make the new world hospitable to old world immigrants required large companies to carry them out. these companies were granted exclusive contracts for these works by the colonial administrators. even after the american revolution, many of these colonial holdovers still functioned due to the contracts and land

read more on -