Well, that was quick. Less than 24 hours after Detroit filed for bankruptcy, a Michigan judge has ruled that the filing is invalid. Ingham County Circuit Court Judge Rosemary Aquilina said that Michigan state law has safeguards which prevent retirement pensions from being diminished. Normally, a federal bankruptcy would supersede those laws, but she decided that the Governor and city violated the state constitution because they "know" that pensions will be impacted as a result of their actions.