Didn’t one side of the state of the state Kentucky, vote for Secession?
It wouldn't do for Lincoln's birth state to secede. Here is what Lincoln said in a September 1861 letter:
"I think to lose Kentucky is nearly the same as to lose the whole game. Kentucky gone, we cannot hold Missouri, nor Maryland. These all against us, and the job on our hands is too large for us. We would as well consent to separation at once, including the surrender of this capitol."