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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 2023, 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.

Zero Tolerance

The Immigrant Children’s Shelters Near You

We found 100 facilities holding immigrant children and have mapped 88 of them. Help us find out more about the facilities and the children being held there.

Zero Tolerance

Estos son los centros con niños inmigrantes que están cerca de ti

Hemos encontrado 100 instalaciones donde están los menores inmigrantes y hemos mapeado 79 de ellas. Ayúdanos a descubrir más sobre los centros y albergues y sobre los niños que están en ellos.

We’ve Found $16.1 Million in Political and Taxpayer Spending at Trump Properties

Most came from political entities such as the Trump campaign, but government agencies chipped in, too. “I could offer clarity,” one federal employee explained, “but I choose not to.”

A Guide for Digging Through Trump’s Financial Disclosures

Here’s how we searched through President Donald Trump’s financial disclosures, and how you can, too.

Trump’s Appointees Pledged Not to Lobby After They Leave. Now They’re Lobbying.

Despite agreeing to five-year bans, at least six former administration officials are registered lobbyists and others are doing similar work without registering.

Trump Body Man Turned EPA Whistleblower Is Violating Ethics Rules, the Agency Says

Kevin Chmielewski, who was fired by the EPA in March, spent a year in the Trump administration but never filed a financial disclosure form. That could bring criminal consequences.

How You Can Use Trump Town

Look through thousands of records on Trump administration appointees. Here’s how you can use them in your research.