February 1, 2018 Sovereign Immunity Fully Insulates a Tribe from Lawsuits Sovereign immunity protects a tribe even after successful veil piercing. 6th Circuit , Michigan , Michigan Eastern District , November 21, 2017 “Substantial Contribution” Claim Allowed in Chapter 13 Split grows on whether ‘substantial contribution’ claims are limited to chapters 9 and 11. 6th Circuit , Michigan , Michigan Eastern District ,