What's the Biggest Threat to the Warriors' Bid for an NBA Championship Repeat?

The Golden State Warriors are entering the 2016 NBA playoffs with a historic level of momentum after their record-breaking regular season, but their winning a second consecutive championship is far from a foregone conclusion.  

What is the biggest threat to the Warriors' bid to repeat as champions?

Watch Stephen Nelson and Bleacher Report NBA Analyst Ric Bucher reveal the biggest threats to the Warriors' title hopes in the video above.