reporter: several changes, migrants will be pro actively asked if they fear going to mexico, and categories of vulnerable people will be exempted but the changes, for critics, do nothing to alleviate concerns. we see people today even living in terrible circumstances, yet more people will be returned to the dangers. reporter: during the trump administration, tent cities popped up, people living in squalor conditions, easy prey for the criminal organizations operating at the border. menendez says his concern is the border is actually expanding. by adding new nationalities, to this policy, applying mexico policy nation wide, they are going beyond implementation of the court s order. for migrants already living in mexico they say the conditions they re forced to wade in on the