Then-Rep. Xavier Becerra (D-CA) listens during a news conference to discuss the rhetoric of presidential candidate Donald Trump, at the U.S. Capitol, May 11, 2016, in Washington, D.C.

The Commerce Department on Monday announced Secretary Wilbur Ross’s decision to include a citizenship question on the 2020 U.S. Census, per the Justice Department’s request. The citizenship question would affect immigrants’ response rates, which will affect the data that determines everything from funding to federal representation for their communities.

Almost immediately, California filed suit against the Trump administration, arguing that the citizenship question violates the government’s duty to conduct an “actual enumeration” of the total population. The census has included both citizens and non-citizens since 1790. The citizenship question hasn’t appeared on the census since the 1950s.

Hours later, former Attorney General Eric Holder, who leads the National Democratic Redistricting Committee, announced that NRDC will also fight the census question.

x Breaking: Former Attorney General Eric Holder, now with National Democratic Redistricting Committee, says the NDRC will go to court to fight the Census citizenship question decision. pic.twitter.com/V82dDJxp5L — Chris Geidner (@chrisgeidner) March 27, 2018

California Attorney General Xavier Becerra and Secretary of State Alex Padilla published an op-ed explaining the citizenship question’s likely effects on Californians.