It doesn't have a definition it's a phrase president Thomas Jefferson used in his first inaugural address in 1801 calling for a cautious, isolationist foreign policy
Answer:
The root issue for the nullification crisis was:
B States wanted to nullify federal laws that they deemed unconstitutional
Explanation:
The Nullification crisis has its roots in the refusal to collect tariffs between 1828 and 1832 by the state of South Carolina.
The Middle colonies were called the “Breadbasket colonies” because of their fertile soil, ideal for farming.