Additionally, the Rome Statute identifies two scenarios where the questions of whether the accused is a State party national or the crime was allegedly committed on the soil of a State party are irrelevant.
Second, a State that is not party to the Rome Statute may choose to accept the Court's jurisdiction for the specific crime in question -- in other words, a non-party alleging a crime was committed on its soil may invoke the Court's jurisdiction for purposes of addressing that specific crime.
If he did, he might explain that the Republican party was formed around an always-uneasy alliance between Whig prosperity-mongers and Free Soil puritans.