Will the Obama Library (and the Obamas) Desert Chicago for New York?

Apparently the Obamas are strongly considering settling in NYC when he leaves office, and the Obama Library may quite possibly be located at Columbia instead of the U of Chicago, which had seemed a lock. Note the reasons (emphasis added):

Barack and Michelle Obama are seriously considering moving to New York after his presidency, and building the Obama Library at the city’s Columbia University, sources told BuzzFeed News. 

Columbia’s bid on the library — and the notion of the Obamas in New York — has been widely viewed as a kind of courtesy to the Big Apple, with the universal assumption among even the Obamas’ inner circle that the couple would move back to Chicago in January 2017. But sources familiar with the process said their thinking has changed in recent months, the result both of messy Chicago politics and a personal craving for a new beginning when they leave the White House for the last time as residents. The first family fears the Chicago they left is not one they want to return to, and a source close to the family said the long-shot New York library bid has emerged as a serious alternative.

What, Chicago's too screwed up for the Obamas? That's funny.