Notre Dame upset by NIU: Instant reactions to historic Northern Illinois win USA TODAYAP Top 25 Takeaways: 3 years in at Notre Dame, Marcus Freeman is again explaining a stunning loss WOODTV.comWhere does Notre Dame’s stunning loss fall among the biggest upsets in college football history? Yahoo SportsNotre Dame’s good vibes disintegrate after another inexplicable home loss, so how many more will be tolerated? CBS SportsWhy does what happened to Notre Dame football Saturday keep happening? South Bend Tribune