In the latest Taliban video released earlier this week, Sgt. Bowe Bergdahl appears fairly healthy and alert.
But in another video shown to Congress behind closed doors, lawmakers say he appeared tired, impaired, sick, barely responsive - perhaps drugged.
Some lawmakers agreed it was enough to justify President Obama's quick order to get Bergdahl out without consulting Congress first.
Not everyone's convinced.
"That did not sell me at all. The proof of life is based on five months ago, December. At that time he was impaired," said Senator Joe Manchin, (D) West Virginia.
"There is no intelligence that indicated that from a medical standpoint his life was in danger," said Senator Saxby Chambliss, (R) Georgia.
Senators briefed by the Administration Tuesday are also concerned about the five Taliban leaders released in exchange for Sgt. Bergdahl.
"What this really did is return five very dangerous people to the fight against America," asked Senator Marco Rubio, (R) Florida.
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