The top US military commander in Iraq is warning the Obama administration could delay its pledge to withdraw all US troops by the end of 2011. Speaking to the Times of London, General Ray Odierno said the US could stay longer if Iraq fails to hold national elections early next year. The US has been pressuring Iraq to hold the election while also lobbying against a proposed referendum on whether to approve the US-Iraqi Status of Forces Agreement, or SOFA. The agreement calls for a US withdrawal by the end of 2011. But if Iraqis reject the timetable, US troops would be forced to leave nearly a year earlier.