I haven’t had time to read this opinion or the dissent yet, but the summaries I’ve read indicate that Montana has rejected the U.S. Supreme Court’s reasoning and ruling in Citizens United. I especially love this from the dissenting justice (who thinks the state is bound by CU):
Corporations are artificial creatures of law. As such, they should enjoy only those powers—not constitutional rights, but legislatively-conferred powers—that are concomitant with their legitimate function, that being limited liability investment vehicles for business. Corporations are not persons. Human beings are persons, and it is an affront to the inviolable dignity of our species that courts have created a legal fiction which forces people—human beings—to share fundamental natural rights with soulless creations of government. Worse still, while corporations and human beings share many of the same rights under the law, they clearly are not bound equally to the same codes of good conduct, decency, and morality, and they are not held equally accountable for their sins.
Via multiple sources, link to opinion from Alternet.