Donald Trump won't self-fund his general-election campaign, and will instead create a "world-class finance organization," the presumptive Republican nominee said in an interview on Wednesday. For a campaign expected to cost more than $1 billion, "I'll be putting up money, but won't be completely self-funding, as I did during the primaries," Mr. Trump said. The New York businessman, who did receive some mostly small unsolicited donations, lent his campaign $36 million of the $47 million he spent through March. That plan represents a shift for Mr. Trump, who has for months portrayed his Republican opponents as "puppets" for relying on...