Todd Spangler NY Digital EditorDavid Blaine nixed his plan to float over the Hudson River from New Jersey to New York City strapped to a bunch of helium balloons, blaming logistical challenges.Instead, the magician and performer will attempt to perform the stunt — which is being bankrolled by YouTube as an original livestreaming special — more than 2,000 miles away in Arizona.“Because of the complexity of this project, I’m not going forward with my plans to do New York City at this time,”