For 10 points, name this agreement passed in 1820 under Henry Clay's leadership that admitted Maine and the namesake state, banning slavery below its southern boundary.
The drafting of this document was catalyzed by memorials presented on the same day by John Holmes and John Scott, and it was proposed by Jesse Thomas. A proposed amendment to this document asked for children of slaves to be freed after the age of 25, but it was passed without this Tallmadge Amendment. It was eventually repealed by the Kansas-Nebraska Act in 1854, and was declared unconstitutional by the Dred Scott case. For 10 points, name this agreement passed in 1820 under Henry Clay's leadership that admitted Maine and the namesake state, banning slavery below its southern boundary.
The drafting of this document was catalyzed by memorials presented on the same day by John Holmes and John Scott, and it was proposed by Jesse Thomas.
{Missouri} Compromise