The governor of New York faces an interesting choice.

He can do the natural thing, the thing with momentum, the thing he's been trained to do his entire life: run for a full term. That involves raising a lot of money, living on the road, compromising a lot to gain support and almost certainly losing, probably in the primary.

Or, he can quit. He can win the embrace of his party, of power brokers and his family by quitting now, as opposed to losing later.

It's hard to see a better illustration of ...