House Democrats are delaying a vote by mid-April to prevent President Trump from unilaterally waging war with Iran by fear they lack the votes to pass the measure. The delay is causing frustration among some lawmakers and progressive groups. While Democrats had planned to force a vote this week, four Democrats voted against it. The resolution failed in a 212-219 vote. The Democrats have been working to secure these votes, but have shown they still have a strong appetite for another vote. While war powers resolutions are largely ineffective, a successful House vote can signal a powerful rebuke of operations in the Middle East.