Not enough money, so want to direct it toward races that they have a chance of winning:

The decision to abandon much of the state came after internal party polls showed Republican candidates in at least three once-promising races falling behind their Democratic opponents, a party official briefed on the internal deliberations said.

As a result, Republican leaders are diverting money to candidates in other races in which party officials believe they have a greater chance of success, the official said.

The decision by national Republicans to focus on a smaller group of races underscores the degree to which the party is on the defensive not only in New York but also in New Jersey, Connecticut and many other states. The national party is short on cash and is being forced into the difficult position of deciding where to continue to fight — and where to effectively surrender — as the election enters the final days of campaigning.

I’d say it was a realization that they were throwing good money after bad, but all Republican money is bad money.

Happy dance!