Alex Mierjeski
I’m a research reporter at ProPublica based in New York.
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What I Cover
I cover a wide range of stories as a part of ProPublica’s national team. Most recently, I’ve contributed to investigations of the Supreme Court and the federal judiciary, as well as President Donald Trump’s business dealings.
My Background
I’ve worked with both local and national teams at ProPublica, where I’ve been a research reporter since 2020.
My work alongside colleagues in the newsroom has spurred change, driven news cycles and won awards. In 2024, my colleagues and I received the Pulitzer Prize for public service for our work revealing ties between Supreme Court justices and billionaire benefactors. Our stories helped lead to the court establishing a code of conduct — a first in its history. Our work also won a George Polk Award, the Selden Ring Award and an Investigative Reporters and Editors medal.
Prior to ProPublica I was a post-graduate reporting fellow at the Columbia University Graduate School of Journalism.
Armed and Underground: Inside the Turbulent, Secret World of an American Militia
Rounding up migrants. Lists of “friendly” sheriffs. Debating political assassinations. Internal messages reveal AP3’s journey from Jan. 6 through the tumultuous lead-up to the 2024 election. One member predicts: “It’ll be decided at the ammo box.”
After Nike Leaders Promised Climate Action, Their Corporate Jets Kept Flying — and Polluting
Nike has staked a claim as a corporate leader on sustainability. Yet company disclosures show that its jets emitted almost 20% more carbon dioxide last year than in 2015. It’s one small factor in Nike’s failure to slash emissions as promised.
Trump Media Quietly Enters Deal With a Republican Donor Who Could Benefit From a Second Trump Administration
The deal with energy magnate James E. Davison illustrates how Trump’s stake in the Truth Social company, which makes up a majority of his net worth, presents conflicts of interest.
Trump Media Made a Deal That Could Secure a Major Financial Windfall for the GOP Candidate
The company behind Trump’s Truth Social platform has the option to sell up to $2.5 billion worth of shares, easing the way for the former president to convert his paper stake into something more tangible.
Nike Pledged to Shrink Its Carbon Footprint. It Just Slashed the Staff Charged With Making That Happen.
Since December, Nike has lost about 30% of employees who worked primarily on sustainability initiatives, due to layoffs, voluntary departures or transfers to other duties. Already, the company was missing its targets for reducing emissions.
Harlan Crow Provided Clarence Thomas at Least 3 Previously Undisclosed Private Jet Trips, Senate Probe Finds
The Supreme Court justice flew to Montana and other destinations on the billionaire GOP donor’s dime. Crow’s lawyer revealed these flights to the Senate Judiciary Committee, whose ongoing investigation was sparked by ProPublica’s reporting.
Justice Thomas Acknowledges He Should Have Disclosed Free Trips From Billionaire Donor
The trips include vacations in Indonesia and at the exclusive, men’s-only Bohemian Grove retreat, which were first reported by ProPublica last year.
For the Women Who Accused the Trump Campaign of Harassment, It’s Been More Harassment
Trump is well known for publicly bullying his political rivals, but the former president’s campaign has also used similar tactics to launch private, relentless attacks against some of its own workers.
Blinken Is Sitting on Staff Recommendations to Sanction Israeli Military Units Linked to Killings or Rapes
A special State Department panel told Secretary of State Antony Blinken that the U.S. should restrict arms sales to Israeli military units that have been credibly accused of human rights abuses. He has not taken any action.
Trump’s Lawyers Told the Court That No One Would Give Him a Bond. Then He Got a Lifeline, but They Didn’t Tell the Judges.
An appeals court reduced Trump’s bond by more than 60% after his attorneys claimed it was a “practical impossibility” to pay the full amount. Their failure to disclose a proposal from a billionaire financier may have violated ethics rules.