Thomas Homan, acting chief of U.S. Immigration and Customs Enforcement, said Monday that immigration enforcement is thriving under President Trump's leadership unlike any recent commander in chief.

"This president has done more for border security and public safety than any of the six presidents I've worked for. Just since his leadership in January, border crossings are at a 45-year low. Now that's not a coincidence. That's because this president has let the men and women of Border Patrol and ICE do their job," Homan told Fox News' "Fox and Friends."

Homan was nominated in mid-November to permanently oversee the interior enforcement agency under the Department of Homeland Security.

As a candidate, Trump promised to deport criminal illegal immigrants on his first day in office. During the administration's first 100 days, more than 41,000 illegal immigrants were arrested under Homan's command of ICE.

Homan has taken on Trump's tone on illegal immigration. In June, he told the estimated 11 million people in the U.S. illegally to "look over your shoulder" because he would not ignore some immigration policies as Obama or former DHS Secretary Jeh Johnson had ordered.

Homan is also opposed to Obama's pro-sanctuary city stance and has demanded all jurisdictions cooperate with ICE requests to detain illegal immigrants who have been picked up by state and local law enforcement for non-immigration-related crimes.

In June 2016, Homan testified that deportation numbers were not down because there was no one to deport, but because of the Obama administration's opposition to carrying them out.

As of this past July, Homan said the demand for criminal illegal immigrants in local jails has increased 80 percent.

Customs and Border Protection is due to release its annual report of border apprehension numbers from fiscal year 2017 at any time. The numbers are expected to be dramatically lower than last year's.