Trump Supporter Emailed Campaign About Public WikiLeaks Trove

Top officials were notified Russia-stolen communications were available in September 2016

A Donald Trump supporter in September 2016 emailed top campaign officials, including Mr. Trump and one of his sons, to flag a recent release of emails stolen by Russian hackers and published by the website WikiLeaks, according to an email reviewed by The Wall Street Journal.

“WikiLeaks has uploaded another (huge 678mb) archive of files from DNC,” wrote the supporter, Michael Erickson, who is president of a Virginia aviation-consulting company. “It is too big for me to send you by e-mail attachments,” he added, and provided a link to a database where he said they could “download it yourselves.” Mr. Erickson also provided a decryption key in the Sept. 14 message.