This is from a recent report in the Los Angeles Times:

Former President Trump and his administration spent years arguing that people who cross the border without permission should not be able to easily apply for asylum in the United States. That decades-old practice no longer works, Trump and his team insisted.

International and U.S. law has long allowed people who cross borders to seek protection from persecution. But if implemented, Biden’s proposal would make it very difficult for migrants who travel through another country on their way to the U.S. and then cross the border without permission to win asylum here. The policy would roll back America’s longstanding commitments to people seeking asylum, placing strict limits on where and how those who flee persecution can apply for protection.