Answer:
States could ignore national laws if they were harmful to the state
Step-by-step explanation:
"States Rights" were political powers provided to American states. These powers were independent of the federal government and allowed states to have a degree of autonomy. For southern states, this autonomy was mainly related to the right to maintain a system of slavery in their agricultural sector. In that case, when the union considered banning slavery in the country, the southern states, through "States Rights", stated that they could ignore national laws if it hurt the states.