U.S. President Donald Trump’s Justice Department announced Monday that it is pursuing assault charges against a Democratic congresswoman from New Jersey who took part in an oversight visit at a privately run migrant detention center in Newark earlier this month.

In a statement, Interim U.S. Attorney for the District of New Jersey Alina Habba announced the charges against U.S. Rep. LaMonica McIver (D-N.J.), claiming the lawmaker “assaulted, impeded, and interfered with law enforcement” at GEO Group’s Delaney Hall. Immigration and Customs Enforcement (ICE) awarded GEO Group a billion-dollar contract earlier this year to detain migrants there, even as the facility faced legal challenges and accusations of abuse.

McIver rejected the charges against her as “purely political,” saying that “they mischaracterize and distort my actions” in an attempt to “criminalize and deter legislative oversight.”