 This is Morning Edition from NPR News. I'm A. Martinez. And I'm Steve Inskeep. The way the presidential campaigns work, the nominee for a major party has to come up with a vice presidential nominee sometime before the convention, which for Republicans is less than three weeks away. Donald Trump is treating his vice presidential search a little like his old days hosting The Apprentice, and the hopefuls are rushing to make their final sales pitches. NPR's Jung Yoon Han reports.