The biggest donor to Donald Trump's presidential campaign has, so far, been Trump. But Bloomberg's Zachary Mider reports that the second largest donor is a also a real estate developer.

Of the contributions disclosed so far, the biggest Trump supporter in the country is Geoffrey Palmer, a real-estate developer in Beverly Hills, who gave $2 million to a pro-Trump group known as Rebuilding America Now. Palmer isn't widely known in donor circles and hadn't previously written checks of that size, according to Federal Election Commission data.

The California real estate community has also produced other major Trump donors, including Tom Barrack, in Santa Monica.

Barrack, a real-estate investor, hosted Trump's first fundraiser in May, and gave $415,000 to a committee raising money for both Trump and the party.

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