“Lincoln didn’t do that either. He emancipated only the slaves held in states under rebellion. They weren’t freed in the north. It was an act to control an asset of war...slavery, by the commander in chief. The second point, that he successfully managed the war is arguable as well. ‘Emancipating’ the South’s labor source was the best tactical move he made. And that is what it was. It didn’t end slavery.”
He emancipated (i.e., “freed”) no one. He had no authority over the Confederate states and thus no one was emancipated. Hell, he specifically EXCLUDED from his Emancipation Proclamation the slaves in areas of the Confededracy the Yankees DID control (i.e., New Orleans and some of the Southern Louisiana parishes).
Yes he did. As president he had authority over all the United States. Even those engaged in rebellion.