The state of California filed suit late Monday against the Trump administration, arguing the decision to add a question about respondents’ citizenship status to the 2020 Census is a violation of the U.S. Constitution. The Commerce Department announced Monday night that, for the first time since 1950, the Census will ask people if they’re citizens—a pledge made in the early days of the Trump administration, which claimed the step was needed so it could better enforce the Voting Rights Act. Critics say including the citizenship question will discourage non-citizens from filling out the census, leading to a population undercount that could affect the distribution of funding and the drawing of congressional districts. “The Census numbers provide the backbone for planning how our communities can grow and thrive in the coming decade,” California Attorney General Xavier Becerra said in a statement. “What the Trump administration is requesting is not just alarming, it is an unconstitutional attempt to discourage an accurate Census count.”