The U.S. Justice Department on Thursday sued Texas over its new voting law, expanding its effort to challenge Republican-backed measures passed in state legislatures.

The lawsuit, brought by the DOJ’s civil rights division in the U.S. District Court for the Western District of Texas, challenges provisions in the Texas law, known as SB 1, that place new procedural requirements on voting by mail and restrict the assistance voters with disabilities or those who struggle to read and write are able to receive in filling out a ballot.