Tldr the Court ruled the argument for why should the question be added was bad so it got blocked, it may still pass if a better argument is made up
It will be officially printed without the question
EDIT 2: according to Trump that was fake news
The Supreme Court found Thursday that the Trump administration did not give an adequate reason for adding a citizenship question to the 2020 census, blocking the question for at least the time being.
The move is a surprise win for advocates who opposed the question's addition, arguing it will lead to an inaccurate population count. The administration had argued the question was needed to enforce the Voting Rights Act (VRA).
The justices sent the issue back to the Commerce Department to provide another explanation.
Chief Justice John Roberts joined with the court's liberal wing in delivering the court's opinion.
Roberts wrote "that the decision to reinstate a citizenship question cannot be adequately explained in terms of [the Department of Justice's] request for improved citizenship data to better enforce the VRA."
"Several points, considered together, reveal a significant mismatch between the decision [Commerce Secretary Wilbur Ross] made and the rationale he provided."
Roberts pointed to evidence showing that Ross, whose department oversees the census, intended to include a citizenship question on the census "about a week into his tenure, but it contains no hint that he was considering VRA enforcement in connection with that project."
And he noted that the Justice Department didn't indicate any interest in the citizenship data until contacted by Commerce officials, and that the evidence "suggests that DOJ's interest was directed more to helping the Commerce Department than to securing the data."
"Altogether, the evidence tells a story that does not match the explanation the secretary gave for his decision," Roberts wrote.
"In the Secretary's telling, Commerce was simply acting on a routine data request from another agency. Yet the materials before us indicate that Commerce went to great lengths to elicit the request from DOJ (or any other willing agency)," he continued. "And unlike a typical case in which an agency may have both stated and unstated reasons for a decision, here the VRA enforcement rationale-the sole stated reason-seems to have been contrived. We are presented, in other words, with an explanation for agency action that is incongruent with what the record reveals about the agency's priorities and decisionmaking process."
However, the chief justice said that the decision to add the citizenship question was not "substantively invalid."
"But agencies must pursue their goals reasonably," Roberts said. "What was provided here was more of a distraction."
While Trump officials had pointed to the VRA as reason to add the citizenship question, critics argued that asking about citizenship status would lead to an undercount of the total population. Census data is used for items like drawing congressional districts and allocating federal funds to states, and opponents said an inaccurate population count would harm Americans and cause some to not receive needed funds.
Justices Ruth Bader Ginsburg, Stephen Breyer, Sonia Sotomayor and Elana Kagan, the liberal members of the court, joined on the part of Roberts's opinion opposing the question.
Justices Clarence Thomas, Samuel Alito, Neil Gorsuch and Brett Kavanaugh dissented.
In a dissenting opinion, Thomas wrote that, "For the first time ever, the court invalidates an agency action solely because it questions the sincerity of the agency's otherwise adequate rationale."
"This conclusion is extraordinary," he wrote. "The court engages in an unauthorized inquiry into evidence not properly before us to reach an unsupported conclusion."
Groups that had challenged the citizenship question's addition to the census in court quickly celebrated the ruling.
New York Attorney General Letitia James, whose state had led the lawsuit presented before the Supreme Court, said that because of Thursday's ruling "the census will remain a tool for delivering on our government's promise of fairness and equity, and states, like New York, will not be shortchanged out of critical resources or political representation."
"Our democracy withstood this challenge, but make no mistake, many threats continue to lie ahead from the Trump administration and we will not stop fighting. Now, more than ever, the marginalized, the disenfranchised, and everyday people need us to stand firm in our fight for justice. After all, everyone counts, and therefore, everyone must be counted."
The ruling is handed down as the Commerce Department says it has a deadline of June 30 - Sunday - to start printing census materials.
And it comes as another lawsuit challenging the question plays out in federal court in Maryland.
The Fourth Circuit Court of Appeals ruled this week that a district judge in Maryland could review whether there was a discriminatory intent behind the question's addition, in light of new evidence filed in the lawsuit. That opens the door for the judge to potentially block the question on those grounds, as it's a different legal question than the one presented to the Supreme Court.
That new evidence pertains to late Republican redistricting strategist Thomas Hofeller, as documents were recently uncovered from Hofeller's hard drives as part of a separate lawsuit in North Carolina that indicate he played a previously undisclosed role in the orchestration of the citizenship question.
The documents indicate that Hofeller conducted an unpublished study in 2015 that found asking about citizenship would help Republicans in redistricting, while hurting Latinx communities and Democrats.
It also suggests that Hofeller may have helped in the drafting of a memo used by the Trump administration to argue for the citizenship question. And emails also show that a Census Bureau staffer was in touch with Hofeller about the citizenship question back in 2015.
Documents relating to Hofeller's role have been filed in a pair of separate lawsuits challenging the citizenship question, in federal court in New York and Maryland. The New York lawsuit was the case under consideration by the Supreme Court
The ACLU has notified the Supreme Court of the evidence. And it requested that the justices send the case back down to a lower court, to allow new evidence to be officially added to the lawsuit - a motion the court is scheduled to discuss during a private conference Thursday.
But the Trump administration asked the justices to rule on whether the addition of the question violates equal protection claims, in an effort to preempt any action out of a lower court.
Groups challenging the citizenship question in federal court in Maryland also requested late Wednesday that District Judge George Hazel issue a preliminary injunction by Friday to block the question from appearing on the census.
Hazel, an Obama appointee, has asked the Trump administration to reply to that request by 8 p.m. Thursday.
EDIT 2: according to Trump that was fake news