What factors prompted president lincoln to change his mind and issue the emancipation proclamation?

There were several reasons that Lincoln announced and implemented the Emancipation Proclamation at the end of 1862, early 1863. His basic goal was to turn the war from a political focus to a morally based focus. First, Lincoln was in a difficult situation, militarily. The North had lost most of the battles that had been fought, and many Northerners were beginning to grumble about the war. Lincoln hoped that the change to a moral focus on slavery would cement Northern support. In addition, several European countries, including England and France, were considering formal recognition of the Confederacy. Lincoln correctly believed that the shift to a moral focus on slavery would prevent that recognition. Thirdly, Lincoln hoped that the promise of freedom would cause revolts among Southern slaves and lead them to support the Northern armies. Finally, Lincoln, himself, had come to believe personally that freeing the slaves was the right thing to do. The move was risky on his part because he could have easily pushed the border states into joining the Confederate cause, which is why the Proclamation only frees the slaves in rebellious territory. However, while the Proclamation did become a campaign issue in the 1864 elections, it did exactly what Lincoln had hoped, changed the war from a political conflict into a moral struggle which needed to be fought to the end.