Biden gave voters who watched the debate a clear choice in the remaining primary elections and, if successful there, a defining one in November.
For the first time since the Democratic primary debates began, the stage will see just two candidates: Joe Biden and Bernie Sanders.
Will the Biden juggernaut continue to build or will Sanders rebound? One of the many questions still facing Democrats.
Biden also has former Massachusetts Gov. Deval Patrick in his camp. New Jersey Senator Cory Booker is still sitting on the fence.