...when DJT took over...before he had the COVID-19 induced "Title 42" ability to refuse entries...our system was not up to the challenge of immigrant surges, as noted in this excerpt from the PEW Research article...
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ICE, which handles the majority of deportations, said in its most recent year-end report that its removal operations have encountered several challenges, including a growing backlog of cases in the immigration courts and “judicial and legislative constraints” that make it difficult to deport minors and family members.
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i.e. the very same issues facing the Biden administration "Judicial and legislative constraints"...which, btw, the bipartisan Senate Bill addressed. There is no Silver Bullet to fix our Border...it takes LEGISLATION...and the GOP...under Trump's direction, is perpetuating the problem for political gain...and allowing dangerous persons to remain in the country. ..does this make sense?...of course not.
Link: https://www.pewresearch.org/short-reads/2020/03/02/how-border-apprehensions-ice-arrests-and-deportations-have-changed-under-trump/