Which main idea from the Magna Carta formed a basis for American constitutional law? Even leaders are not above the law.
Courts should have the final say regarding laws.
All people are entitled to vote for their representatives.
Local governments should be the most powerful.

The idea from the magna carta that helped formed the basis for American Constitutional law is Courts should have the final say regarding laws.

Explanation:

on june 23, 1972, the president signed title ix of the education amendments of 1972, 20 u.s.c. into law. title ix is a comprehensive federal law that prohibits discrimination on the basis of sex in any federally funded education program or activity.