Donations to Donald Trump’s Campaign Outpace Self-Funding

For months, Donald J. Trump has highlighted his credentials as a politician who was financing his own campaign for president.

No longer.

Mr. Trump revealed in a filing Thursday to the Federal Election Commission that the vast majority of the money he raised and spent this summer as he rose to the top of national polls came not from his own coffers, as it had in the spring, but from about $3.7 million in what he called “unsolicited contributions.” Some 74,000 donors pitched in an average of about $50 to help his campaign, he reported.

Mr. Trump himself contributed only about $100,000 in in-kind contributions, including rent space that he donated and payroll expenses that he covered. That represented a hu