Kristi Noem actually said...

The Trump administration has given the American people the safest and most secure border in American history.

We will take care of their documentation and travel documents, and it will go smoothly.

If you are here illegally, we will find you and we will deport you. You will never return. But if you leave now, you may have an opportunity...

If you are here illegally, self-deportation is the best, safest, and most cost-effective way to leave the United States to avoid arrest.