Since when did Abe give a crap about the Constitution. LOL.
Since Lincoln was a lawyer by profession.
It's how he made his living, for decades.
So Lincoln cared a lot about the law, and naturally about the Constitution.
Indeed, that's one reason we know that claims, "it was all about the money" are bogus.
Lincoln's first priority was his oath of office to the Constitution.
All assertions to the contrary are just nonsense propaganda, pro-Confederate koolaid drinking, FRiend.