Saying it had completed an investigation into alleged voter irregularities, Iran’s election authority on Monday stood by its findings that gave hardline President Mahmoud Ahmadinejad an overwhelming victory and sparked more than two weeks of chaos in the streets. There was “no tangible irregularity,” Guardian Council spokesman Abbas Ali Kadkhodaei told government-run Press TV after reporting that a recount of some 10 percent of the votes found no significant differences.