The Justice Department's announcement about the changing legal team heightened speculation that there have been concerns among members of the original legal team tasked with carrying out President Donald Trump's demands to include the citizenship question, despite a recent Supreme Court ruling blocking the move.
An executive order is expected to be instantly challenged in court, while the administration is under a deadline to print the census.
The group celebrated Furman's decision, writing in a statement: "The court ruled that the Trump administration must satisfactorily explain why it has removed its census lawyer team".
Trump said early Thursday on Twitter that he would be holding a news conference "on the Census and Citizenship" but didn't disclose further details.
"Every way forward for the citizenship question is a dead end", Thomas Wolf, counsel for the Democracy Program at the Brennan Center for Justice, told Newsweek. Chief Justice John Roberts wrote in his opinion that a citizenship question may be permissible in the future if the government is able to rationally validate their decision to include the inquiry.
The census is used to determine how many seats each state gets in the U.S. House of Representatives and also affects how billions of dollars in federal funds are doled out across the country. Cory Booker, D-N.J., who is vying for the Democratic nomination, introduced a bill Wednesday aimed at prohibiting the use of a census citizenship question for districting.
Attorney General Bill Barr said Monday the administration would decide in the "next day or two" on which option to take on the census.
Furman cited local court rules on withdrawing attorneys that require courts to consider the reasons for the withdrawal and the impact on potential case disruptions.
It's unclear what new rationale for asking the question the administration might include in a presidential memorandum.
The inaccurate posts ask why President Donald Trump needs permission to query households about citizenship status on the 2020 census and blames Obama for scrubbing the question from the 2010 survey.
A NY judge made the decision Tuesday, saying the request is "patently deficient".
The U.S. Census Bureau is part of the Commerce Department.
After staking their entire strategy on the claim that the census question had to be expedited and that America can not afford even a moment's delay, the Justice Department asked the court to authorize a wholesale substitution of its legal team days before briefs are due.
Trump has repeatedly railed at people against adding the question, saying it's a simple one.
The American Civil Liberties Union had opposed the "mass withdrawal" of the legal team.