The House on Wednesday approved President Obama's request to arm and train Syrian rebels in the fight against ISIS.
With significant opposition to the proposal in both parties, the vote was 273 -156. More than one third of the House - 71 Republicans and 85 Democrats - voted no.
Many Republicans argue the strategy isn't tough enough to defeat ISIS; many Democrats worry the plan could drag the United States into another long military engagement.
The proposal would authorize the Pentagon to provide assistance to "appropriately vetted" members of the Syrian opposition and require the administration to give Congress a detailed plan for helping the rebels before that assistance could begin.
The Senate will vote Thursday on the proposal.
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