The answers are
-States that already had slavery could remain so
-He did not want to see slavery grow any more.
Although he later would push for the Emancipation Proclamation and full abolition of slavery, Abraham Lincoln ran as a moderate voice in the Republican Party. He followed the official party line at the time of anti-expansion: no new slave states. This meant that states that had slavery could remain so, and he did not want to see slavery grow any further.
