Lincoln would still have carried these four states even if his 3 opponents combined.
1860 Election
Popular Vote
State Lincoln Bell Douglas Breckinridge Total
opposing Lincoln
New York 362,646 *312,510 312,510
Indiana 139,033 5,306 115,509 12,295 133,110
Ohio 231,610 12,194 187,232 11,405 210,831
Illinois 172,161 4,913 160,215 2,404 167,532
* Fusion
Unfortunatey, I cannot ID my source for this table