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.
Republicans Hatched a Secret Assault on the Voting Rights Act in Washington State
After he helped create the state’s voting maps, a redistricting commissioner quietly worked with national Republican figures to bring a lawsuit against his own work.
In the Scar of New Mexico’s Largest Wildfire, a Legal Battle Is Brewing: What Is Victims’ Suffering Worth?
A wildfire accidentally started by the federal government drove them from their homes and destroyed the things they loved most about their land. The government will pay them only for things with a price tag.
Local Reporting Network
Supreme Connections: Search Supreme Court Financial Disclosures
Find organizations and people that have paid the current justices, reimbursed them for travel, given them gifts and more.
A “Delicate Matter”: Clarence Thomas’ Private Complaints About Money Sparked Fears He Would Resign
Interviews and newly unearthed documents reveal that Thomas, facing financial strain, privately pushed for a higher salary and to allow Supreme Court justices to take speaking fees.
The Supreme Court Has Adopted a Conduct Code, but Who Will Enforce It?
Experts say it is unclear if the new rules, which come after reporting by ProPublica and others revealed that justices had repeatedly failed to disclose gifts and travel from wealthy donors, would address the issues raised by the recent revelations.
It’s Not Personal: Why Clarence Thomas’ Trip to the Koch Summit Undermines His Ethics Defense
Even by Thomas’ own permissive interpretation, the justice’s recently revealed travel to Palm Springs and the Bohemian Grove appear to violate the disclosure law, experts explained.
Clarence Thomas Secretly Participated in Koch Network Donor Events
Thomas has attended at least two Koch donor summits, putting him in the extraordinary position of having helped a political network that has brought multiple cases before the Supreme Court.
Clarence Thomas Acknowledges Undisclosed Real Estate Deal With Harlan Crow and Discloses Private Jet Flights
The new filing comes after ProPublica’s reporting on the Supreme Court justice’s beneficial relationship with the billionaire GOP megadonor. Thomas also reported three private jet trips provided by Crow.
Clarence Thomas’ 38 Vacations: The Other Billionaires Who Have Treated the Supreme Court Justice to Luxury Travel
The fullest accounting yet shows how Thomas has secretly reaped the benefits from a network of wealthy and well-connected patrons that is far more extensive than previously understood.
Senators Ask Billionaire Paul Singer and Power Broker Leonard Leo for Full Accounting of Gifts to Supreme Court Justices
The letters cite ProPublica’s reporting on an undisclosed private jet flight and Alaska fishing vacation provided to Justice Samuel Alito.