Who planned and negotiated the Missouri Compromise?

The Missouri Compromise was primarily planned and negotiated by Henry Clay, a prominent American statesman and Speaker of the House. He played a crucial role in crafting the compromise to resolve tensions between slave and free states over the admission of Missouri as a slave state. The agreement, reached in 1820, allowed Missouri to enter the Union as a slave state while Maine was admitted as a free state, and it established a geographic line to limit the spread of slavery in the Louisiana Territory. Clay's efforts aimed to maintain a delicate balance between the interests of both factions.