Civil rights groups and labor unions sued the Trump administration on Friday, asserting that its aggressive immigration enforcement and suggestions that it could send armed agents to polling sites amounted to voter intimidation and violated the Voting Rights Act.

Brought by a coalition of Black, Asian and Latino civil rights groups and unions, including the N.A.A.C.P. and the Service Employees International Union, the lawsuit seeks to block any effort by the Trump administration to deploy federal agents at voting locations, which the groups contend can deter citizens trying to legally vote. The lawsuit, filed in the U.S. District Court for the District of Columbia, argues that President Trump, Secretary of Homeland Security Markwayne Mullin and other members of the administration had created a climate in which “voters, especially voters of color, are intimidated and fearful of engaging in the democratic process.”

The suit says the administration pushed false narratives of rampant voting by noncitizens, conducted sweeping immigration enforcement in communities of color and repeatedly suggested sending armed agents to polls. The White House and the Department of Homeland Security did not immediately respond to requests for comment. Markwayne Mullin has previously said opponents were fear-mongering and that ICE was not patrolling polling places.

The lawsuit argues these actions violated Section 11(b) of the Voting Rights Act, which prohibits intimidation, threats, and coercion directed at voters. This is at least the second lawsuit seeking to block the Trump administration from deploying armed federal agents near polling stations.