Immigration policy openness — work visas, family reunification, asylum processing, border enforcement posture.
DHS Secretary Napolitano memorandum 15 Jun 2012 established DACA — prosecutorial-discretion relief + work authorisation for unauthorised immigrants brought to US as children meeting age + education + background criteria. ~800,000 initial recipients. Trump administration attempted rescission Sep 2017; SCOTUS blocked in DHS v Regents Jun 2020. Status litigated through 2020s; new applications blocked by Texas v US.
Per invariant 3, reforms are scored by what they did on each channel-separated axis, not by the party that enacted them. This fingerprint is how the policy-match engine finds historical analogues.
Explicit links are curated by the author. Inferred links are hypotheses in the library that test the same axes this policy moved — the framework's answer to "what does the data say about a policy like this?".
Ranked by axis-fingerprint overlap with this policy. Direction match bolded — those are the closest historical analogues. Shape of the match is what drives policy-outcome comparison, not the country or party label.