The new rule is a key part of President Joe Biden's border enforcement plan as COVID-19 restrictions - known as Title 42 - are set to end just before midnight on Thursday. Under Title 42, which has been in place since March 2020, many border crossers were rapidly expelled to Mexico without a chance to seek asylum, leading to repeat attempts. "We heard that Title 42 was going to end and that after that there won't be an option," said Diana, 30, who declined to give her last name. The total surpasses a scenario outlined by a top U.S. border official last month for the period after Title 42 ends. A coalition of 22 Republican state attorneys general has opposed the new asylum rule for being "riddled with exceptions."