Jimmy Hatch says Bergdahl "needs to know how much was risked" to try to save him.
Republicans say the president paid too high a price for the soldier's return.
Officials say he was headed to another U.S. military base to report problems in his unit.
The administration is defending the prisoner swap as "worthwhile."
Jen Psaki said Obama was "familiar" with the desertion accusations before making the deal.
A desertion charge for Sgt. Bowe Bergdahl could prove embarrassing for the White House.
Outgoing Defense secretary reveals disagreements with administration.
The president's efforts to close the prison camp have picked up pace.
Army has been investigating whether solider kidnapped by Taliban had deserted.
He vowed to uncover more details about Obama's decision if he chairs Armed Services panel.
Executive branch must notify Congress before transferring Guantánamo Bay prisoners.
The GAO said the Pentagon violated the 2014 Defense Appropriations Act.
“It’s not going to change the balance of the effort with five guys," McChrystal said.
Does the president feel sick to his stomach over his decision to trade five Taliban prisoners for...
Bush said troops who lost their lives for Bergdahl "didn't get the same attention."
Bergdahl was charged Wednesday with desertion and misbehavior before the enemy.
The charges reignite the debate over whether Obama paid too high a price for his release.
The safe thing to do is convict him. But there's no point to it.
A man in the Bergdahl swap has reportedly sought to return to militancy.
Army forwards case to commander with power to convene military court.
The Defense secretary said the group's gains had been "reversed" in some areas.
If allegations are true, it could contradict U.S. policy not to pay ransom for hostages.
While recent cases center on Americans held captive, there are key differences.
The Army says its investigation will run through September.