Donald Trump scores procedural victory as Supreme Court refuses to block his plan to exclude illegal immigrants from the Census - for now

 The U.S. Supreme Court on Friday threw out a lawsuit seeking to block President Donald Trump's plan to exclude immigrants living in the United States illegally from the population count used to allocate congressional districts to states.

The 6-3 ruling on ideological lines with the court's six conservatives in the majority and three liberals dissenting, gives Trump a short-term victory as he pursues his hard-line policies toward immigration in the final weeks of his presidency.

However, his administration is battling against the clock to follow through on the vaguely defined proposal before President-elect Joe Biden takes office on Jan 20. 

The justices left open the possibility of fresh litigation if Trump's administration completes its plan.

The unsigned decision said that 'judicial resolution of this dispute is premature' in part because it is not clear what the administration plans to do. The ruling noted that the court was not weighing the merits of Trump's plan.

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Ruling: Trump won a procedural victory on his move to exclude illegal aliens from the Census but the court warned it had not ruled on whether it was legal to do so

Plan: Trump wants to remove from the Census count people in the U.S. without legal status - which states including New York say is illegal

Challengers led by New York state and the American Civil Liberties Union said Trump's proposal would dilute the political clout of states with larger numbers of such immigrants, including heavily Democratic California, by undercounting state populations and depriving them of seats in the U.S. House of Representatives to the benefit of his fellow Republicans.

'If the administration actually tries to implement this policy, we'll sue. Again. And we'll win,' said Dale Ho, a lawyer for the American Civil Liberties Union who represents the challengers.

The administration has not disclosed what method it would use to calculate the number of people it proposed to exclude or which subsets of immigrants would be targeted. 

Acting Solicitor General Jeffrey Wall told the justices during the Nov. 30 oral argument in the case that the administration could miss a Dec. 31 statutory deadline to finalize a Census Bureau report to Trump containing the final population data, including the number of immigrants excluded.

'The government does not deny that, if carried out, the policy will harm the plaintiffs. Nor does it deny that it will implement that policy imminently,' liberal Justice Stephen Breyer wrote in a dissenting opinion.

Breyer noted that the government can currently try to exclude millions of individuals, including those who are in immigration detention or deportation proceedings, and the some 700,000 young people known as 'Dreamers' who came to the U.S. illegally as children.

There are an estimated 11 million immigrants living in the United States illegally. The challengers have argued that Trump's policy violates both the Constitution and the Census Act, a federal law that outlines how the census is conducted.

The Constitution requires apportionment of House seats to be based upon the 'whole number of persons in each state.' Until now, the U.S. government's practice was to count all people regardless of their citizenship or immigration status.

By statute, the president is required to send Congress a report in early January with the population of each of the states and their entitled number of House districts.