Which part of the compromise of 1850 was the most controversial after passage?

Fugitive Slave Act The Act standout amongst the most questionable components of the 1850 bargain and uplifted Northern feelings of trepidation of a "slave control scheme". It required that all got away slaves were, upon catch, to be sent back to their lords and that authorities and residents of free states needed to coordinate in this law. End to slavery campaigners nicknamed it the bloodhound law because those were the kind of animals that were utilised to find runaway slaves

The answer should be europe