Abraham Lincoln did not plan on ending slavery when he was elected President and was unsure of how to do so after he was elected.  Abraham Lincoln did not want Black people and white people to have the same social and political rights.  He felt as if slavery was morally wrong, but did not believe the Constitution offered the federal government the power to end it for all states.  Abraham Lincoln's famous Emancipation Proclamation was not a way for Abraham Lincoln to end slavery, it was a way for the Lincoln administration to appease both the Northern abolitionists and the Southern slave holders.  Abraham Lincoln did not have initial plans to end slavery and did not end slavery until the very end of his Presidency.
Abraham Lincoln did have plans to end slavery. The problem for Abraham Lincoln was not his goal of ending slavery, but of how to without inciting more chaos and rebellion during the Civil War. 
Rejecting the premises