Magoffin's plan was to unite the slave states around a set of minimum concessions to see if the North would accept them as an alternative to war. The concessions included a constitutional amendment repealing any state law that interfered with enforcement of the Fugitive Slave Act, passage of amendments to the Fugitive Slave Act ensuring that any state that would not return a fugitive slave or obstructed a slave's return would compensate the owner of the slave, passage of a law requiring extradition of anyone indicted by a grand jury for enticing the escape of a slave, passage of an amendment to the constitution guaranteeing slavery in all current and future territories south of 36 degrees north latitude, passage of an amendment to the constitution guaranteeing all states the right of using the Mississippi River, and provide protection for southern states in the U.S. Senate from oppressive slavery legislation. After the slave state governors refused Magoffin's plan, he endorsed the Crittenden Compromise, authored by fellow Kentuckian John J. Crittenden.