Lincoln's Christianity by Michael Burkhimer

[Gene C]

My opinion....
I do not recall this book addressing your question.
and...
I do not believe Lincoln uses bible passages and "religiousness" to appeal to certain classes of voters. He wants to appeal to all voters, even those in the south. In what may have been his most "religious" speech, the second inaugural address, was made after he was re-elected. The use of biblical references gives a higher authority and reason/justification for change he feels need to be made, an authority higher than the president or government. It adds reason and purpose to the large loss of life as a result of the war. I think Lincoln sincerely believed he was a tool God was using to bring about the end of slavery