RAND has all the answers on what we need to do at the border.

While politically challenging, a holistic update to U.S. immigration laws based on a better understanding of American immigration needs and the factors that are driving people to make the dangerous trek to cross the border would help reduce the numbers of migrants arriving daily to the U.S.-Mexico border and the challenges migration poses to receiving localities. This would require building on the current efforts to provide lawful pathways, easing the burden on host communities, matching immigration policies with the needs of the labor market, and addressing root causes of migration, while adhering to American legal and humanitarian responsibilities.

https://www.rand.org/pubs/commentary/2024/02/the-crisis-at-the-border-a-primer-for-confused-americans.html

There you go. This sounds like a decade-long project at least, so politicians with 2-4 year election cycles would need to sell voters with 20 minute attention spans on it now, then competently implement it over the course of a generation.