What is justification for letting into the US, even one muslim "refugee?" It is a FACT that most go on public assistance, and there is the risk some become future terrorism "sleepers."
If not them, then their offspring, as with the Orlando and San Bernardino situations.
The risks of taking them, far outweigh the benefits. Let them stay, in the shitholes that they come from.
A president's highest priority is safety, and taking in dangerous people is not how that is done, period, full stop.
(Of course the same logic applies to Europe. Why does Germany or Sweden commit self-mutilation?)