-snip- Her background in finance has proved useful: Quite at ease asking for large sums of money, Mrs. Cruz makes as many as 10 calls a day seeking the maximum contribution couples can make to the campaign. "The $10,800 contributions is my lane," she said. Inside the campaign, Mrs. Cruz has built a model that seems lifted from Wall Street, with donors labeled "investors" who are privy to "quarterly investor meetings" to discuss the "product." She also helped recruit an important fund-raiser, Lila Ontiveros, after Ms. Ontiveros left Goldman Sachs. At times, the dual role of Goldman executive and political...