The Constitutional Convention began on May 25, 1787 in Philadelphia to improve the failing Articles of Confederation. George Washington presided over the convention and James Madison took extensive notes. The delegates debated issues such as the balance of power between federal and state governments, representation in Congress, and the divisive issue of slavery. They proposed plans like the Virginia Plan for a stronger national government and the New Jersey Plan favoring state power. The Great Compromise created a bicameral legislature to balance state and population-based representation. Further compromises addressed slavery, including the Three-Fifths Compromise to determine representation and taxes based on population including slaves.