With the number of illegal aliens crossing the southern border into the U.S. continuing to drop, a report from the Center for Immigration Studies explains why this is the case.

Fox News correspondent Bill Melugin posted to X that a source told him there were only around 2,070 illegal aliens apprehended by Border Patrol yesterday across the different sectors at the southern border—making it the lowest number of crossings since January 2021. 

The top three sectors were San Diego with 648 illegal aliens, Tucson with 485, and El Paso with 414.

In response, Todd Bensman, a Senior National Security Fellow with CIS, posted an article explaining what might be the cause of a steady decline in illegal crossings. 

According to the article, forces under Mexico’s central government are reportedly rounding up illegal aliens in the northern part of Mexico and busing and flying them to southern cities like Tapachula—on the border of Guatemala. 

Federal forces are also installing road checks to catch, return, and deter illegal aliens who are still getting through the border. Additionally, Mexico also appeared to ramp up air deportations from its southern provinces, sending rebellious and uncooperative aliens back to their home countries.

Mexican authorities have also emptied and torn down at least one migrant camp—the one in Matamoros across the Rio Grande from Brownsville, Texas. Alongside demolishing the camps, they also dug trenches in spots along the Mexican side of the Rio Grande to deter more illegal aliens from crossing into the U.S.

Bensman lays out how after three years of letting trains be used by illegal aliens to enter the U.S., Mexico City had ordered its military to blockade rail yards. Mexican authorities have also removed migrants already on trains that stop en route to other northern Mexican cities. 

“According to Mexican media, this is part of a broader ‘agreement’ signed by Mexico’s immigration service and the U.S. Border Patrol to also block northbound immigrants on public roads,” wrote Bensman. 

Although it’s unclear what has led to Mexico finally helping curb the flow of illegal immigration, Bensman revealed, “A source close to U.S. Customs and Border Protection’s foreign operations division in Mexico told me one element of the Biden proposal is that AMLO slow the flow only until after the November election.” He admits that this is an uncorroborated claim, but it could explain the shift. 

Although May border numbers have yet to be released to the public, CBP reported that there were more than 189,000 encounters at the southwest border in March. By April, CBP reported only 179,725 encounters. 

Emily Medeiros

Emily graduated from the University of Oklahoma majoring in Journalism. She is excited to use her research and writing skills to report on important issues around Texas.