It's not American to use federal Government to override the decisions of the states?

Gary Johnson's campaign message @0:35 says it is not, i e uses the same words as above but with a full stop instead of a question mark. http://www.youtube.com/watch?feature=player_embedded&v=WCu3lZMvFcs#! What is his stance on Abe Lincoln? Was Abe wrong in overriding the states wanting to secede and which had even decided to secede?