Trump's campaign fundraising falling far short of Clinton's
Neither Trump nor his party saw an immediate fundraising boost last month, even though he emerged victorious on May 4 after a primary contest once crowded with 16 opponents.
The RNC — which Trump says he is counting on to provide much of his general election operations — took in about $13 million last month.
In May 2012, presumptive nominee Mitt Romney and the RNC raised more than $76 million, about quadruple this May's haul.
The figures appear to undercut Trump's comments that money is "pouring in" to the party.
On NBC's "Today," Trump brushed aside concerns about fundraising, while saying he wished he had more support from his own party.
Douglas Kimmelman, an investment manager at Energy Capital Partners, gave $50,000.
On the Republican side, the Freedom Partners Action Fund, a political group led by conservative billionaire industrialists Charles and David Koch, collected $8 million, mostly in large donations, last month.
The group has already produced ads against Democratic candidates Ted Strickland in Ohio and Russ Feingold in Wisconsin, among others, and began June with almost $14 million in available cash.
Democratic super PACs active in the House and Senate races include House Majority PAC and Senate Majority PAC.