New York Attorney General Eric Schneiderman, a vocal critic of President Trump, has hired a prosecutor who served under fired U.S. Attorney Preet Bharara to focus on public corruption cases, including those involving the Trump administration, according to a Wall Street Journal report.

Schneiderman’s decision to hire Howard Master reportedly signals that he plans to target Trump and his administration. Master previously served under Bharara, who was fired after refusing to resign at Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE’s request.

Master worked on high-profile cases at the Department of Justice, including the prosecution of New York State Assembly Speaker Sheldon Silver.

Eric Soufer, a spokesman for Schneiderman, confirmed the hire to the Journal.

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“[He] will be working on a wide range of civil and criminal investigations and enforcement matters, including public corruption, complex civil litigation,” Soufer said.

The White House did not immediately respond to the Journal’s request for comment.

Schneiderman has a history with Trump, including a fraud lawsuit in 2013 over the billionaire's now-defunct real estate school, Trump University.

The New York attorney general also recently joined colleagues in other states in challenges to Trump’s immigration ban and climate change plans.

Schneiderman’s office just last week joined the lawsuit by Washington state against the Trump’s revised immigration ban.

“The Trump administration’s continued intent to discriminate against Muslims is clear, and it undermines New York’s families, institutions and economy,” Schneiderman said last week.