On the surface all looks like a go for rebuilding New York’s Penn Station within the old US Post Office across the street from Madison Square Garden. “Designed by David Childs of Skidmore, Owings & Merrill, the project, with its soaring glass-enclosed great hall, was originally unveiled in 1999. It has been a pet project of politicians from both sides of the aisle, including Senator Daniel Patrick Moynihan, for whom the proposed station is named, and Gov. George E. Pataki. Most of the $800 million needed to complete the project’s construction has been in place since 2001. And the post office abandoned the space this summer, in part to make room for the news media covering the convention.” So why has the project stalled out?