The Republican Party first became a major political party with the election of what president

Abraham Lincoln

Explanation:

The Republican Party first came to power in the elections of 1860 when it won control of both houses of Congress and its candidate, former congressman Abraham Lincoln, was elected President.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.

sitting in that one chair where he could get shot at was his worst decision.