"those six countries that have no government where we can vet them"

Yeah, in fact it's really ironic that one of Trump's arguments is that we have to deny entry to citizens from those countries 𝒃𝒆𝒄𝒂𝒖𝒔𝒆 𝒕𝒉𝒆𝒊𝒓 𝒈𝒐𝒗𝒆𝒓𝒏𝒎𝒆𝒏𝒕𝒔 𝒅𝒐𝒏'𝒕 𝒉𝒂𝒗𝒆 𝒂𝒏 "𝒆𝒙𝒕𝒓𝒆𝒎𝒆 𝒗𝒆𝒕𝒕𝒊𝒏𝒈" 𝒑𝒓𝒐𝒄𝒆𝒔𝒔!  

(As if any third-world countries now have, or will have anytime in the near future, a robust vetting procedure for those who wish to 𝒆𝒎𝒊𝒈𝒓𝒂𝒕𝒆.  Actually, even the US doesn't have that:  If you want to go somewhere else, don't let the door hit ya, is the extent of our "vetting".)

This, from the same fella who argues that we, the United States, are the only ones who can vet incoming individuals "extremely" enough that we can safely let them into our country.  You know, that argument actually makes some sense.

But it sure won't work for him to try to argue both sides of the same argument.  That only makes both arguments sound foolish, particularly the first one.