Keeping in mind the 'role playing' element in ALC's and that the AI Lincoln is one of the most peaceful players in the game, (if not
the most peaceful, he's up there with Sitting Bull re: low likelihood of war declarations) I would advocate going for a late game UN victory. (not AP since Lincoln is also one of the least religious) So a peaceful early game and then crush whoever stands in your way late game to get elected when diplomacy fails.

Of course, everything is map/situation dependent but this might be a suitable 'tone' for the Lincoln game.
Actually, the ALC's don't delve into role playing. They're all about making the most of the unique characteristics assigned to the leader. There are other game threads that delve into role-playing, but mine doesn't.
The alternative would be having the ability to absorb late game WW for longer before having to raise the slider or revolt to police state.
Since America has such a late UU, which in therefore requires late game wars to be utilized, that's how I was thinking of leveraging the UB.
Long time lurker - first time poster (in an ALC thread).
FWIW I'd say it's time to move to immortal. The way you won the Saladin game on monarch with a weak leader and sub-optimal playing in the beginning (where it tends to matter most), says that for any kind of challenge with a much better leader like Abe you need to increase difficulty.
I'll take that under advisement, though I've been playing on Emperor level rather than Monarch level for a while now...
Long time viewer of the ALC threads, but first time poster on these boards.
If we are truely supposed to follow the leaders traits, shouldn't we by-pass slavery and bee-line to emmancipation?
Again, the "leader's traits" in the game refer to the two unique properties allocated to each leader by the game designers. In Lincoln's case, Charismatic and Philosophical. The former is a warmonger's trait, frankly--faster promotions and more happy citizens to offset the war weariness. And though I'm not role-playing, this fits historically; Lincoln may not have
wanted to be a war president, but he
was one, and successfully led his country through its most threatening constitutional crisis and its most costly war.
Regardless, the ALC threads are all about leveraging what you're given in order to win. As I said above, there are other threads that engage in role-playing, but mine don't. So Lincoln will run Slavery and leverage the Charismatic trait's +1

, as wrong as that may seem to some of you. (Please also remember that I'm not American, and that Lincoln is therefore not one of my sacred cows.

Come to think of it, I don't have any sacred cows... well, maybe Pete Townshend, but that's it.

)