The Trump administration has announced a major change to the US green card application process, potentially affecting thousands of immigrants, especially Indians on H-1B visas. Under the new policy, most applicants seeking permanent residency will now have to leave the United States and apply through consular processing from their home countries. The earlier "adjustment of status" route - which allowed migrants to apply while staying in the US - will now be allowed only in extraordinary circumstances. The move has triggered concern and criticism among immigrant communities.