The owners of an Arizona dairy are asking the Supreme Court for the right to challenge federal price-fixing. The Hettinga family says a government market-fixing law forces them to sell milk to consumers at a higher price than they want to charge. In a petition filed Friday – the Hettingas are asking the Supreme Court to take their case – and ensure their lawsuit gets a fair hearing in the courts by allowing them to introduce evidence that the price-fixing law was passed to target them for unfavorable treatment and to block them from competing. Lower courts have denied the Hettingas a chance to introduce evidence. Both the trial court and the court of appeals threw their lawsuit out – taking the government’s word that the law is rational and not requiring proof for that claim. A principal attorney with Pacific Legal Foundation – who represents the Hettingas – says the case is about more than restrictions on dairies and other businesses. Timothy Sandefur says it’s about whether people challenging the constitutionality of any law can get a fair trial – or whether the government can just recite some magic words and make the case disappear.