Eric Levitz writes in New York Magazine: Donald Trump is having a better week than you are. On Tuesday night, the GOP front-runner didn’t just sweep the five northeastern primaries — he exceeded his polling averages in every state and took home far more delegates than he needed to stay on track for a pre-convention majority. The next day, news broke that Trump had won roughly 40 of Pennsylvania’s 54 unbound delegates. These delegates can vote their conscience, but 31 of those elected to the convention have an explicit preference for the Donald, while at least eight others had vowed to vote for whoever won the popular vote in the Keystone State. Every model of the GOP race had assumed that this group would be populated primarily by Cruz-aligned movement conservatives and #NeverTrump diehards. Thus, Trump’s unexpected popularity with Pennsylvania’s party activists has dramatically broadened his path to the nomination. From there, life got even rosier for the grotesquely wealthy white man: Two new polls of California show Trump winning 49 percent of the state’s vote. The Upshot’s model of Trump’s most plausible path to the nomination sets the mogul’s delegate target in California at 103. When John McCain won California