The largest loophole in border policy has been the asylum process. Asylum seekers receive a preliminary interview which assesses whether or not the seeker has a “credible fear”. If they do they are provided a court date for a hearing and are released into the country.
The interviews “credible fear” standard should be updated with an additional criteria that requires a “rational action” to establish a “credible fear”. While several constraints can be included under this requirement, a principal component should be that the asylum seeker has taken the shortest path to escape the “credible fear”, IE if the distance from their point of origin to the US border is not the shortest path away from their “credible fear” then they have not engaged in a “rational action” to evade their fear and thus their asylum is rejected.
This approach institutes a physical constraint that inhibits the potential an asylum seeker is merely coached.