That makes sense, because a public one sided show trial definitely couldn’t be abused by prosecutors to smear people they have no intent of indicting. Is that actually a position people really believe?
With a grand jury it is illegal to discuss anything, so a one sided smear campaign during a grand jury can lead to an indictment and Chelsea would have no opportunity to offer her side of the story without risking more jail time.
No, it is not; grand jury secrecy rules apply to attorneys, court officials, grand jurors, and government staff to whom material is disclosed to assist attorneys, but not to witnesses called before the grand jury.
So, actually, not only would Manning be allowed to present her side of the story, no one with actual knowledge of her time before the grand jury would be allowed to contradict it.