Grassley Memo Reveals Jack Smith’s Arctic Frost Probe Swept Up Data on 639,000+ Republican Donors, Voters and MAGA Buyers

Senate Judiciary Committee Chairman Chuck Grassley released a memo on October 14, 2026, detailing how former Special Counsel Jack Smith’s office and the Biden Justice Department obtained spreadsheets containing personal and donor information on at least 639,000 Republican donors, voters, and supporters as part of the Arctic Frost investigation into 2020 election matters. The data, drawn from whistleblower disclosures and subpoena returns, includes names, dates of birth, home addresses across most states and territories, emails, registered Republican status, occupations (e.g., retirees, pool technicians, drivers, loggers), donation amounts as low as $1, partial credit card details, and donor analysis fields. It spans records from 2005 to 2021, well before and outside the probe’s stated scope.

The trove also encompassed shipping addresses for purchasers of red MAGA hats and other Trump campaign merchandise. This follows Grassley’s September 29, 2026, disclosure that Smith’s team subpoenaed at least 4,782 donor checks from Trump supporters across all 50 states, D.C., and Puerto Rico—complete with bank routing numbers, signatures, and addresses—routed to former FBI agent Walter Giardina. During a Senate hearing that day, Smith confirmed his team acquired financial information via subpoenas but could not detail every request.

Grassley described the effort as an attempt to “map out the entire Republican Party apparatus,” arguing it exceeded any legitimate investigative need. The revelations build on prior oversight of 197 subpoenas targeting over 430 Republican-linked individuals and entities, as well as phone records of lawmakers. Multiple outlets, including Fox News, Just the News, and the New York Post, reported on the memo, which Grassley posted on his Senate site alongside an official Judiciary Committee release.

Critics frame the data collection as overreach raising privacy concerns for small-dollar donors; supporters of the probe maintain it served a criminal investigation into election interference. No response from Smith or the DOJ has been issued in the reviewed coverage. The episode underscores ongoing partisan battles over the scope of federal investigations into political figures and their supporters.