Missoulian: “HELENA — State officials said Thursday that a federal grand jury has subpoenaed disputed documents involving a secretive conservative group that critics argue has been illegally coordinating with candidates. The disclosure was made by state officials responding to a Livingston judge’s order requesting the American Tradition Partnership documents. The documents were featured in an October documentary by ‘Frontline’ and a story by ProPublica suggesting the tax-exempt social welfare group coordinated with Republican candidates.”