The Hacking of Presidential Campaigns Begins, With the Usual Fog of Motives

For the third presidential election in a row, the foreign hacking of the campaigns has begun in earnest. But this time, it’s the Iranians, not the Russians, making the first significant move.

On Friday, Microsoft released a report declaring that a hacking group run by the intelligence unit of Iran’s Islamic Revolutionary Guard Corps had successfully breached the account of a “former senior adviser” to a presidential campaign. From that account, Microsoft said, the group sent fake email messages, known as “spear phishing,” to “a high-ranking official of a presidential campaign” in an effort to break into the campaign’s own accounts and databases.

By Saturday night, former President Donald J. Trump was declaring that Microsoft had informed his campaign “that one of our many websites was hacked by the Iranian Government — Never a nice thing to do!” but that the hackers had obtained only “publicly available information.” He attributed it all to what he called, in his signature selective capitalization, a “Weak and Ineffective” Biden administration.

The facts were murkier, and it is unclear what, if anything, the Iranian group, which Microsoft called Mint Sandstorm, was able to achieve.

Mr. Trump’s campaign was already blaming “foreign sources hostile to the United States” for a leak of internal documents that Politico reported on Saturday that it had received, though it is unclear whether those documents indeed emerged from the Iranian efforts or were part of an unrelated leak from inside the campaign.

The New York Times received what appears to be a similar if not identical trove of data from an anonymous tipster purporting to be the same person who emailed the documents to Politico.