EXCLUSIVE — U.S. Customs and Border Protection has achieved a remarkable feat under President Donald Trump, locking down tens of billions of dollars in funding for the largest-ever expansion of border security, while simultaneously bringing the number of illegal immigrant arrests at the southern border to 55-year lows for more than a year.

The Trump administration has used messaging, diplomacy, and policy to bring about those low illegal immigration numbers, and it is pursuing plans to fortify the international boundary with tens of billions of dollars worth of barrier, technology, agents, and other resources.