A racist joke against Puerto Ricans has created aftershocks that may shake up the election NBC NewsPuerto Rico Shadow Senator endorses Trump at PA rally after ‘Kill Tony’ controversy at MSG Fox NewsTrump rallies in majority-Latino Pennsylvania city after supporters’ crude and racist remarks NBC NewsNot-so warm Trump welcome in Allentown as Puerto Ricans swing away after offensive rally USA TODAYTrump’s Puerto Rico fallout is ‘spreading like wildfire’ in Pennsylvania POLITICO