It was not clear whether the talks, expected to involve dozens of countries, would satisfy President Trump’s demand that other nations take a more active part in the Iran war.
Ms. Peters, a former county clerk, received a nine-year sentence after being convicted of tampering with voting machines. An appeals court overturned the sentence but did not immediately free her from prison.
The justices gave respectful consideration to what was once a fringe theory and could rule against it on grounds that would allow Congress to return to the question.