Why do we still say that Columbus "discovered"
the Americas?

The explorer Christopher Columbus made four trips across the Atlantic Ocean from Spain: in 1492, 1493, 1498 and 1502. He was determined to find a direct water route west from Europe to Asia, but he never did. Instead, he stumbled upon the Americas.

Explanation:

Leif Eriksson Day

Leif Eriksson Day commemorates the Norse explorer believed to have led the first European expedition to North America. Nearly 500 years before the birth of Christopher Columbus, a band of European sailors left their homeland behind in search of a new world.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.

d. it adversely affected american productivity