Thats been MY view for a long time now.
A moratorium on ALL immigration until/unless the terrorist situation is resolved.
PERIOD
THEN revisit the matter WITH a more equitable agenda.
And by equitable I mean, fair to US citizens who as always, will bear the burden of tens of thousands of new residents who WILL NOT/CANNOT assimilate.
Because lets face it if you do not/will not assimilate, you are a BURDEN to indigenous populations.... NO MATTER WHERE you live!!!!!
Just adopt what countries like New Zealand are doing. To get a resident visa there, you must have a skill needed there, or bring $1.5 million with you. And then you must pass their English test to qualify. Eliminates most undesirable immigrants.