How did the Emancipation Proclamation transform the Civil War?
O a
Ob
o c
it went from a war to preserve the Union, to a war of liberation, northerners were inspired to fight as armed liberators
it only freed the slaves in the border states, making many northerners upset
it led to major victories for the Confederates at Vicksburg and Gettysburg

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.