What was the LeCompton Constitution?

When the Kansas territory was ready to seek admission to the Union in 1857, the key issue was whether it would be a free state or a slave state. The pro-slavery forces won control of the constitutional convention, which met in the town of Lecompton in September of that year. The complicated fight over the pro-slavery Lecompton Constitutionmanifested the sectional tension that would erupt in the Civil War three years later.