Final answer:
Andrew Jackson's presidency is most notably attributed to the introduction of the spoils system and his support for the Indian Removal Act.
Step-by-step explanation:
Andrew Jackson's presidency is attributed to introducing the spoils system, which was a practice where government jobs were given to political supporters and friends. This was part of Jackson's approach to assert the power of the executive branch and to promote his vision for the nation.
Notably, Jackson's presidency was marked by significant events like the Indian Removal Act, the nullification crisis, and the battle against the Second Bank of the United States. His stance on these issues, especially supporting the Indian Removal Act, had considerable impact and would play a part in forging the political landscape of the time, including leading to the creation of the second party system.