the tribe deals with pollution from nearby superfund sites. >> we are experiencing high rates of cancer, autoimmune diseases, thyroid issues, other chronic health conditions due to the toxic legacy of the industry along the st. lawrence river and we've had to deal with that and it's quite expensive. >> reporter: the allergan deal has been heavily criticized with one senator, claire mccaskill of missouri, seeking to strip tribes of their sovereign immunity to these patent challenges the tribe called the move a double standard, as state universities have the same protections. >> it's almost like an economic apartheid where we're not allowed to do certain things, unless otherwise given permission >> so this case was argued this morning in front of the supreme court. it's expected to be decided by june big tech companies, big pharma companies and of course the st. regis mohawk tribe and other tribes are going to be closely watching the outcome. >> essentially this is the case that will settle, determine the fate of this patent loophole >> exactly whether the tribe can continue to make money in this way depends on whether the court upholds this review system. >> am i confusing the two things to say this loophole was creat