The personality of which president began to alter the relationship between the president and congress and the nature of the presidents leadership

The correct answer is Andrew Jackson. Andrew Jackson is known to be an American soldier and statesman who also served as the 7th president of the United States. He was also known as a national hero after having to defeat the British in the battle of new Orleans.

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.