Some Republicans aren't sure a majority of their conference will back vote.
The Republican-controlled committee approved a rule that will allow vote on amendment.
Even relative hardliners say they will keep the big picture in mind.
Boehner tells new Iraqi leader that Congress will stand with him "shoulder-to-shoulder."
Boehner did not say if a plan to arm Syrian rebels would be attached to a funding measure.
Lawmakers might need to be in D.C. the week of Sept. 29.
"Many questions remain about the way in which the president intends to act" on ISIS, he said.
House Republicans will huddle at 9 a.m. Thursday morning to plot a way forward.
"Security enhancements" are being made around the Capitol complex.
ISIS has set the stage for Republicans to make a splash with their Benghazi probe.
The move gives Rep. Mick Mulvaney a clearer path to lead the Republican Study Committee.
Rep. Xavier Becerra described the ISIS threat as a "long-term challenge."
Cheney says U.S. took eye off terror threat under Obama.
The White House decision to delay action has enraged immigration activists.
Republicans believe they are on the cusp of capturing full control of Congress.
Obama should have "very strongly said we are not gonna take it," Ruppersberger said.
Rep. Tony Cardenas (D-Calif.) said Obama's immigration decision smelled of politics.
Executive action would "further strain" trust between White House and public, he said.
House Majority Leader Kevin McCarthy identified ISIS, jobs/economic growth as key issues.