The battle among a handful of tribes has resulted in major lobbying contracts in recent years.
A bipartisan group wants a "serious and objective reexamination" of Obama's refugee policies.
Republicans are pushing for a review of refugee vetting in the wake of the attacks in Paris.
Remarks are a shift from two months ago, when he called for admitting a "fair share."
The Nevada Democrat said lawmakers are "committed to stopping ISIS."
Sen. Jeff Sessions suggested the recent Paris attacks added "new urgency."
Cristina Marcos 11/16/15 12:46 PM EST
Speaker Ryan has asked administration officials to brief lawmakers.
Keith Laing 11/16/15 12:20 PM EST
The measure would extend federal transportation funding until Dec. 4.
Lawmakers face a looming deadline on infrastructure funding.
Highway funding runs out on Friday.