Republican governor of New Jersey Chris Christie canceled the ARC tunnel project in 2010 after work has just started. I think because he was dumb enough to think that he could use the money to reward political allies. Instead about half the money ended up applied to the California High Speed Rail project.

In 2016 when Trump came into office he canceled the replacement Gateway tunnel project. Why did Trump do that? Probably just as a fuck you to New York, no other reason.