Could President Tyler's ascension cause a Civil War?

As it says in the title:

We know that there were many opposed to Tyler ascending to the Presidency, as well as many for him ascending to it, but the majority, for the most part were wary of constitutional law at this point, and Tyler wanted to top job as he immediately scrambled for it.....so...... Could John Tylers ascension to the Presidency cause a Civil War?
 
The thing is, there's not much of a substantive difference between "acting as the President" and "being the President". The only question that needs settling is whether Tyler can call himself the President (vs. Acting President), and I don't think there's the necessary will to fight over such a distinction. Tyler's the chief executive either way.
 
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