South Dakota Gov. Kristi Noem, Donald Trump's pick to lead the agency central to his vision of cracking down on illegal immigration, will face senators Friday at confirmation hearing that will be her first chance to lay out her vision for the sprawling Department of Homeland Security.

South Dakota Gov. Kristi Noem promised Friday to secure America’s southern border with Mexico as President-elect Donald Trump’s pick for Homeland Security.

Noem faced questions from lawmakers about how she would handle domestic terrorism, but her remarks largely focused on immigration policy, especially along the U.S.-Mexico border.