https://www.gpo.gov/fdsys/pkg/USCODE-1994-title8/pdf/USCODE-1994-title8-chap11-subchapII_2-partII-sec1182.pdf

section 22f

"Whenever the President finds that the entry of any aliens or of any class of aliens into the United States would be detrimental to the interests of the United States, he may by proclamation, and for such period as he shall deem necessary, suspend the entry of all aliens or any class of aliens as immigrants or nonimmigrants, or impose on the entry of aliens any restrictions he may deem to be appropriate."

He doesnt need to go through congress so really all you need is the guy autistically screeching with the profile pic of whoever made this pic superimposed over his head.