Documents obtained and released on Wednesday by the advocacy group Democracy Forward show that the investigative arm of US Immigration and Customs Enforcement has gathered tens of millions of voter records ahead of the midterm elections as part of a purported effort to combat “voter fraud.”

Democracy Forward, which obtained the ICE documents through the Freedom of Information Act, said records from the agency’s Homeland Security Investigations (HSI) branch underscore how the Trump administration is “using the power of the government to try to silence eligible voters and prevent them from accessing the ballot.”