has been riding high these last few weeks, cementing his legacy with
landmark victories on healthcare, gay marriage, and opening a first US
Embassy in Cuba for the first time since the Cold War. Between the
rainbow flag waving and soaring eulogy-writing, though, it was easy to
miss what may have been the president's most significant—and
controversial—victory: the signing of a Trade Promotion Authority bill that gives Obama filibuster-proof superpowers when it comes to negotiating trade deals.