The Biden administration’s plan to delay undoing policies that President Trump implemented to deter migration to the southern border will only delay a migration surge, not prevent it, says the outgoing top U.S. border official.

In an interview with the Washington Examiner Tuesday, acting Customs and Border Protection Commissioner Mark Morgan said that while he was happy to learn that President-elect Joe Biden’s team abandoned its immediate plan to gut Trump’s Remain in Mexico program, which requires asylum-seekers to live in Mexico while they await appearances in U.S. immigration court, Biden’s plan will not hold up to reality.