The Times:

The largest public transit project in the nation, a commuter train tunnel under the Hudson River to Manhattan, was halted on Thursday by Gov. Chris Christie of New Jersey because, he said, the state could not afford its share of the project’s rising cost.

Mr. Christie’s decision stunned other government officials and advocates of public transportation because work on the tunnel was under way and $3 billion of federal financing had already been arranged — more money than had been committed to any other transit project in America. [...]

Mr. Christie’s decision also packed a wallop for the elected officials and transit advocates who spent most of the last two decades cobbling together the design for the tunnel. Several of them criticized the governor for rushing to a judgment that they said would hamstring the region’s economy long into the future.

It's still too early to say whether or not this can be fixed. But as roatti says on Kos, pretty much nailing it:

Years of work by transit advocates, planners and collaboration between 2 states, a bi-state agency, and the federal govt has all been trashed because Chris Christie has a slavish devotion to cutting spending, even if that spending is not wasteful and will pay for itself in economic activity several times over.

This is how Republicans govern. Don't let anybody forget this.

Hammer, nail, head.