What was john crittenden's proposal to save the union?

He proposed a series of constitutional amendments and Congressional legislation aimed at averting war. Under the terms of the “Crittenden Compromise” the following were proposed, that: 

* The Missouri Compromise line (36˚30’ north latitude) be extended through the territories to California; north of the line were to be free states and slave states to the south 
* Congress would not attempt to regulate slavery where it then existed 
* Congress would provide compensation for the owners of fugitive slaves.