Holding “[i]t is well established that failure to raise an issue in the district court constitutes a waiver of the argument” unless certain “extraordinary circumstances” exist
Holding that the exception to the timely filing requirement of a discrimination claim is the continuing violation theory, making it appropriate to measure the running time of the required time period from the last occurrence of the discrimination and not from the first occurrence, and that in congruence with that theory, a hostile work environment claim may rely upon evidence of events occurring long before the relevant filing periods to establish such a claim
Holding that plaintiff's failure to promote claim and train claims are "discrete instances of alleged discrimination that are not susceptible to a continuing violation analysis."