Former Acting Immigration and Customs Enforcement (ICE) Director Tom Homan criticized the Biden administration’s border policies Friday on Fox News, arguing that they empower criminal cartels and undermine national security by allowing millions of immigrants into the country.

Border Patrol has encountered more than 7 million migrants at the southern border since the Biden-Harris administration took office, according to Customs and Border Protection. Homan said that the U.S. will continue to face significant illegal immigration unless former President Donald Trump returns to office.

“They’re not going anywhere, unless President Trump’s back in the White House,” Homan told Laura Ingraham, talking about an influx of migrants from Venezuela, Nicaragua, and Cuba. “Then they’re bringing thousands a day through the CBP1 app … Historic numbers. Mexico stepped up enforcement a little bit. Why? Because they don’t want President Trump to be president. You know who else don’t want President Trump to be president? The criminal cartels in Mexico who are making billions of dollars every month.”

The CBP1 is an app used by migrants seeking asylum to preschedule appointments for processing at the US-Mexico border, according to American Immigration Council.

“The government of Mexico don’t want President Trump to be president because the gravy train’s over. The terrorist organizations around the world who are using the southwest border as an entry point in this country, they don’t want President Trump to be president either,” he added.

Thousands of illegal migrants and other non-citizens convicted of serious offenses such as homicide and sexual assault are currently at large in the U.S, according to federal data disclosed in a letter on Wednesday. The letter, addressed to Republican Texas Rep. Tony Gonzales, indicates that there were over 662,566 non-citizens with criminal records on the Immigration and Customs Enforcement (ICE) national docket as of July 21, encompassing both detained individuals and those not in custody.

A Venezuelan gang called Tren de Aragua is reportedly exploiting the Biden-Harris administration’s border crisis to expand its operations into the United States, with experts indicating that immigration authorities are unable to identify members of this group prior to their arrival on American soil.

During a forum hosted by Oprah Winfrey on Sept. 19, Vice President Kamala Harris gave an evasive response when asked about her strategy for tackling illegal immigration. She referenced her tenure as California’s Attorney General and a prosecutor, then shifted to discussing the failure of a bipartisan border bill, but never directly addressed the issue.