Close it and seal it off with Gorilla Glue.

TRUMP’S MESSAGE TO HOMELAND SECURITY OFFICIAL: CLOSE THE BORDER DESPITE AN EARLIER PROMISE OF A DELAY

"President Trump last week urged Kevin McAleenan, whom he was about to name as acting secretary of homeland security, to close the southwestern border despite having just said that he was delaying a decision on the step for a year, according to three people briefed about the conversation. ...."

https://www.progressnews.network/2019/04/12/trumps-message-to-homeland-security-official-close-the-border-despite-an-earlier-promise-of-a-delay/