Trump was a heck of a lot closer to a majority than Lincoln was, and is pushing towards the Union fulfilling the things it was purportedly established for in the way that it was established.
Other than all those important things, the situations are identical.
I don’t think the North East and California would have as good a case for pulling out as South Carolina did, but in my judgment, you don’t need a case, and if they want to go, Sionara.
Lincoln won 59.4% of the Electoral College Vote.
Trump won 56.5% of the Electoral College Vote.
So your view is any state can leave the Union anytime the state chooses for any reason the State dreams up.