Now that Hillary Clinton has assembled a bipartisan cadre of billionaires to support her candidacy, how does she disperse the moneyed elite to help her in a campaign focused on income inequality?  Warren E. Buffett (known as the Oracle of Omaha) was easy. The low-key billionaire has been at the forefront of efforts to rewrite the tax code so that he does not pay a lower rate than his secretary. But he did not create the behemoth of Berkshire Hathaway, which holds significant stakes in Coca-Cola, American Express and Wells Fargo, among others, by always being nice.  On Monday, he unleashed on her Republican opponent, Donald J. Trump, comparing him to Senator Joseph McCarthy (“Have you no decency, sir?” Mr. Buffett said, quoting a famous rejoinder to the senator) and mocking his bankruptcies.  Meg Whitman, the technology executive and former Republican candidate for governor in California, said she would hold a fund-raiser to help elect Mrs. Clinton. Reed Hastings, the outspoken chief executive of Netflix, and Eric Schmidt, of Google fame, have both expressed support for Mrs. Clinton’s technology and business plans.  Michael R. Bloomberg, the former New York mayor, seemed more eager to cut Mr. Trump down to size than to build up Mrs. Clinton. “I’m a New Yorker, and New Yorkers know a con when we see one!” he said in his address at the Democratic National Convention last month.  Mark Cuban, the co-host of ABC’s “Shark Tank” and owner of the Dallas Mavericks, campaigned with Mrs. Clinton in Pittsburgh on Saturday, and belittled Mr. Trump, calling him a “jagoff.”  “I can tell you as an entrepreneur and investor with absolute certainty that companies and jobs, they won’t be created by terrifying people,” Mr. Cuban, an independent who has toyed with his own presidential run, told the crowd.  In an email interview, Mr. Cuban elaborated on how he hoped to help the Clinton campaign. “Income equality is a huge issue,” said the billionaire, who is friendly with Bill Clinton. He said he supported Mrs. Clinton’s plan to offer tax incentives for companies to share profits with employees. “It’s actually the only way everyday workers can get ‘tag along’ rights with those of us in the 1 percent,” he said.  Mrs. Clinton has said since the start of her campaign that she hopes to be the “small-business president” and has held policy round tables at small businesses across the country, from a bowling alley in Ames, Iowa, to the Knotty Tie Company in Denver on Wednesday. Mr. Cuban, whose reality TV show is based on financing (or mockingly rejecting) the dreams of entrepreneurs with business plans that range from the inspired (boneless barbecue ribs) to the insane (“Cougar” energy drinks for frisky older women), said he hoped to spread that message.  “My hope is that we are able to hold small-business forums to communicate that her platform will encourage small business, not hold it back,” Mr. Cuban said.
Members of the ultra-wealthy such as Mark Cuban, Warren E. Buffett and Michael R. Bloomberg are finding varied roles in a campaign focused in part on income inequality.