WASHINGTON — Army Sgt. Bowe Bergdahl can expect a buoyant homecoming after five years in Taliban hands, but those in the government who worked for his release face mounting questions over the prisoner swap that won his freedom.

Even in the first hours of Bergdahl’s handoff to U.S. special forces in eastern Afghanistan, it was clear this would not be an uncomplicated yellow-ribbon celebration. Five terrorist suspects also walked free, stirring a debate in Washington over whether the exchange will heighten the risk of other Americans being snatched as bargaining chips and whether the released detainees — several senior Taliban figures among them — would find their way back to the fight.

U.S. officials said Sunday that Bergdahl’s health and safety appeared in jeopardy, prompting rapid action to secure his release. “Had we waited and lost him,” said national security adviser Susan Rice, “I don’t think anybody would have forgiven the United States government.”

Republicans said the deal could set a troubling precedent — one called it “shocking.” Arizona Sen. John McCain said of the five Guantanamo detainees, “These are the hardest of the hard core.”

Tireless campaigners for their son’s freedom, Bob and Jani Bergdahl thanked all who were behind the effort to retrieve him. “You were not left behind,” Bob Bergdahl told reporters, as if speaking to his son. “We are so proud of the way this was carried out.” He spoke in Boise, Idaho, wearing a long bushy beard he’d grown to honor his son, as residents in the sergeant’s hometown of Hailey prepared for a homecoming celebration.