President-elect Donald Trump's choice for Homeland Security secretary portrayed illegal immigration as an "invasion" and the U.S.-Mexico border as a "war zone" during a U.S. Senate confirmation on Friday where she pledged to back Trump's hard line on immigration.

South Dakota Gov. Kristi Noem, Donald Trump's pick to lead the agency central to his vision of cracking down on illegal immigration, faced senators Friday at a confirmation hearing and promised to be a tough hand in carrying out the president's vision for the sprawling Department of Homeland Security.

The Flandreau Santee Sioux Tribe, the smallest in the state, also congratulated the GOP governor on her nomination to be Trump's homeland security secretary.

Noem's role as Homeland Security secretary is expected to be more limited in scope than her predecessors’, sources familiar with the Trump transition tell NBC News.

Kristi Noem, a two-term governor and former U.S. congresswoman, was chosen by the president-elect to lead the department responsible for key immigration and border-related actions that will be

South Dakota Gov. Kristi Noem’s advancement to the cusp of confirmation as a Trump cabinet secretary probably surprised some people who thought her career ended nine months ago with a notoriously disastrous book release.

Kristi Noem, President-elect Trump's pick for Homeland Security Secretary, said she would bring bring back some of Trump's border policies, including the "remain in Mexico" policy that keeps migrants out of the U.

Fox News' Chad Pergram reports on the timeline for a possible Noem confirmation to the Department of Homeland Security as the delayed Senate hearing kicks off on Capitol Hill.

South Dakota Gov. Kristi Noem served in Congress during Trump’s first administration and sent the National Guard to the Texas-Mexico border.

Donald Trump's nominee to lead the Department of Homeland Security, Gov. Kristi Noem (R-SD), vowed to prioritize border security should she be confirmed.

South Dakota Gov. Kristi Noem is facing senators during her confirmation hearing as she vies to become the next Homeland Security secretary.