Different time, closer delegate count, and Ted Cruz is no Abraham Lincoln. Lincoln was called "Honest Abe". Ted Cruz doesn't seem to such a moniker.
Also, perhaps you recall what happened to the Union after Lincoln became President?
It's telling that you have to go back over 160 years to cite an example of what Ted Cruz is trying to do.
Ted Cruz getting the GOP nomination, after limping into the campaign with 700 delegates or so, at best, would result in a Civil War that would splinter the party, destroy voter enthusiasm, countless Trump voters would stay home, and Hillary would win in a landslide in November.
Is that really what you want?
Vote Trump
What I want is for somebody to get a majority of delegates...something that has always been required...is that too much to ask?