Orin Kramer, a New York investor and major bundler for Mr. Obama’s campaigns, is helping Pete Buttigieg, the 37-year-old mayor of South Bend, Ind., as is Steve Elmendorf, a Washington, D.C., strategist and fundraiser who supported Hillary Clinton in 2016. Former Texas Rep. Beto O’Rourke, meanwhile, is being helped by Mark Gallogly, a New York-based investment manager, and Louis Susman, a Chicago-based investment banker and former U.S. ambassador to the U.K. California Sen. Kamala Harris has attended fundraisers in Florida led by two top bundlers with deep Obama and Clinton ties: Kirk Wagar, a former U.S. ambassador to Singapore, and Alexander Heckler, a Miami Beach attorney.
Small donors help candidates save time and can provide constant cash infusions, Democratic strategists say.
Mr. Rospars wrote on Twitter this month: “The high-dollar chase is less and less sustainable as the contest unfolds—the lowest-hanging fruit is already collected, and in a crowded field it will suck up more time and money and organizational focus for candidates to raise it.”
Mr. Sanders said he raised $600,000 in his first 24 hours as a candidate from supporters who agreed to have monthly contributions to him deducted automatically. He raised more than $18 million in his first six weeks as a candidate, FEC records show.