NEW: DOJ attorney John Coghlan tells a federal court in Maryland the Trump admin doesn't know what groups of unauthorized immigrants — other than those in ICE detention centers — it could feasibly exclude from the census numbers used to reallocate House seats per Trump's memo.

2. But the three-judge court in Maryland sounded very skeptical that the Census Bureau does not have plans given what the bureau's Associate Director Al Fontenot said in this court filing: https://twitter.com/hansilowang/status/1312218985975500801?s=20

3. At multiple points, the 3-judge court asked, and DOJ attorney John Coghlan avoided directly answering, what "other Presidential Memorandum–related outputs" the Census Bureau plans to provide to the commerce secretary by Jan. 11, 2021. Coghlan said it's a "dynamic" process.

4. At one point, DOJ attorney John Coghlan seemed to suggest that when the Census Bureau processes the #2020Census responses, it will try to match them with "high-quality" government records to try to identify more groups of unauthorized immigrants.

5. Asked by U.S. District Judge Ellen Hollander if the unnamed state with supposedly 2.2 million unauthorized immigrants that President Trump's July memo references here is California, DOJ attorney John Coghlan said, "I believe that's correct."
https://www.whitehouse.gov/presidential-actions/memorandum-excluding-illegal-aliens-apportionment-base-following-2020-census/

6. Judge Hollander asked DOJ attorney John Coghlan how Trump came up with the 2.2 million estimate. Coghlan did not identify a specific source. Plaintiffs' attorney Shankar Duraiswamy suggested it was from the Pew Research Center:
https://www.pewresearch.org/hispanic/interactives/u-s-unauthorized-immigrants-by-state/