Another primary day, another slew of landslide wins by Joe Biden. In Florida, the former vice president won every single county in the state, capturing 62% of the vote in the process. With the exception of Champaign County, Illinois was Biden territory, where he dominated with voters over the age of 45, noncollege-educated whites, and African Americans. And in Arizona, a state the Bernie Sanders campaign thought could be in play given the senator’s solid support from Latinos in neighboring Nevada, Biden won by 12 percentage points.

Sanders may be spending the day determining whether there is any opening left for him to push forward, but make no mistake: This thing is over. Biden is the presumptive Democratic presidential nominee, which means Biden is about to enter into the major leagues of presidential campaigning, something he never had to worry about during his two previous runs for the presidency.