WATCH: U.S. Customs and Border Protection commissioner testifies on Trump’s immigration policies

Kevin McAleenan, commissioner for the U.S. Customs and Border Protection, is scheduled to testify at a hearing Tuesday before the Senate Judiciary Committee.

Watch the commissioner’s remarks in the player above.

The commissioner is expected to field questions about the Trump administration’s immigration policies, including a plan reported in November to make asylum-seekers remain at the border in Mexico while their cases proceed in immigration courts in the U.S. Experts have said that President Donald Trump doesn’t have the legal authority to make such a change in asylum law in the U.S.

CBP also released new numbers Monday that showed a spike in people at the southwest border who are claiming a fear of persecution back in their home countries.

The immigration agency said there have been 92,959 “credible fear” claims, the first step in the asylum process, in fiscal year 2018. That’s a 67 percent jump from 55,584 claims documented the previous fiscal year.

Furthermore, CBP said that these “credible fear” claims accounted for 18 percent of all people who were apprehended or stopped at the border this past fiscal year. That’s up from 13 percent in the previous year.

READ MORE: What’s happening with asylum-seekers at the border?