If you accept the premise (that the visa system has holes) then of course you would want to suspend immigration from high risk areas while those holes are addre

If you accept the premise (that the visa system has holes) then of course you would want to suspend immigration from high risk areas while those holes are addressed. Of course, I'm sure you don't agree with the premise. But you should at least acknowledge that if you did, that a suspension would be needed while revising the rules. To do otherwise would be transparently stupid, since it would basically advertise the vulnerability while leaving it open, giving people a timeline to exploit it.