1972:
Humphrey ends his Presidency on a high note, as he signs a bill into law that mainly benefits Southerners. Muskie easily gets the nomination, although the Southern primaries are closely contested between Governor Carter of Georgia and Governor Wallace of Alabama. Muskie ends up picking Carter as his runningmate. For the Republicans, 37 year-old Senator Jack Kemp receives the nomination and picks Wyoming Governor Stanley Hathaway. Kemp presents himself as a moderate, but on election day it is a virtual tie. It all comes down to Arkansas, where Muskie eeks out a victory by 10,000 votes.
Muskie/Carter: 49.5%, 273 electoral votes
Kemp/Hathaway: 49.25%, 265 electoral votes
In your scenario, Kemp is popular enough in NY to be elected to the Senate, yet can't carry it in the election?