he wrote as an attempt to remove the states necessity to succeed. Although Calhoun agreed that states were entitled to rights, his goal was to bring unity, this did not exactly work out as Calhoun planned. A third major area of disagreement that does not come with a specific episode, but arguable many, is the issue over slavery in regards to expansion. As the United States began to acquire more land from Mexico, states struggled to agree with whether these states would be free or slave states. Failure to get on the same page led to massive campaigns, some of which were violent and eventually carries us into the civil war.