What President Did Francis Scott Key become friends with ?

President Andrew Jackson.

Explanation:

Francis Scott Key was an American attorney, amateur poet and author who wrote the lyrics of the national anthem of the United States of America (The Star-Spangled Banner). He was born on the 1st of August, 1779 in Frederick County, Maryland, United States of America.

Francis Scott Key became friends with President Andrew Jackson, as well as an adviser.

President Andrew Jackson was born on the 5th of March, 1767 in the old British America and died on the 8th of June, 1845 in Tennessee, USA. He was elected as the 7th President of the United States of America between 1829 and 1837.

During his tenure as the seventh president of the United States of America (1829-1837), President Andrew Jackson was mockingly being referred to by his critics as "King Andrew I" due to his style of leadership and rash display of power (authoritarianism) without recourse to the US Congress.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.