cannot grant clemency for a state criminal conviction.

Trump has nevertheless purported to pardon at least one person convicted under state law: former Colorado county clerk Tina Peters. The legal basis and effect of such an action are distinct from the president's clearly established federal pardon authority.

Lindsay Clancy case ends in mistrial

The backstory:

At trial, Clancy's lawyers argued she ​was not guilty by ​reason of insanity, ⁠saying she was experiencing a psychotic episode caused by postpartum psychosis. Meanwhile, prosecutors argued the killings were premeditated.

RELATED: Lindsay Clancy murder trial ends in mistrial after jury deadlocked

Following legal procedures that took several hours last Friday, the judge in the murder trial declared a mistrial after the jury earlier in the day told the judge they were deadlocked on whether Clancy was criminally responsible for killing her three children.

The jury of nine women and three men, was on its seventh day of deliberations, a day after the jury's foreperson told the judge a single juror wouldn't follow the court's instructions about reasonable doubt. The extraordinary disclosure, made in the form of a note delivered to the judge Thursday, offered the clearest glimpse yet of what kept jurors from reaching a verdict.

What's next:

Clancy will continue to be held at the Tewksbury State Hospital. The case essentially goes back to the same status as before the trial, with Clancy charged with murder and being held at the psychiatric hospital and waiting for a resolution of the criminal case against her.

Judge William Sullivan scheduled a status hearing for Sept. 29 and prosecutors indicated in court Friday that they would ideally like to retry the case later this fall, although no definitive timetable has been set.

Prosecutors will have to decide whether to try her again with a new jury. If they proceed with a new trial, the jury selection process will begin again, and a new trial will be scheduled.