She is not being held for trial. She has been convicted... of contempt of a contemptible court. The judge can keep her there until she caves in and starts issuing homosexual marriage licenses with her signature.
I’ve been looking around, and there are some small limitations..
Another significant contempt statute, often referred to as the federal recalcitrant witness statute, is 28 U.S.C. § 1826. This statute is triggered “[w]henever a witness in any proceeding before or ancillary to any court or grand jury of the United States refuses without just cause shown to testify or provide other information.”103 In cases where the witness so refuses without just cause, the involved court may summarily order the confinement of the witness until such time as the witness changes his or her mind. Although a stubbornly resistant witness may be confined to coerce compliance, the period of confinement may not exceed the term of the grand jury or the life of the court proceeding.104 In no case, however, may this coercive-oriented confinement exceed 18 months105 – creating the possibility that coercive confinement will terminate even in fact of disobedience.106
In addition to this, the court generally cannot impose both a fine and imprisonment.
I wonder how long to the end of her term. If she fails to run again it would seem to remove the grounds for contempt.