Republican presidential candidate Mitt Romney on Wednesday repeated his call to add more troops, saying the Iraq war had left the United State's military seriously stressed. The former governor of Massachusetts said he supported President George W. Bush's decision to intervene in Iraq, but conceded that the effort has had plenty of missteps. "I think we've made a number of mistakes," said Romney, opening a two-day campaign trip to Iowa by speaking to a business group. "We were under prepared for what developed. I don't think we had anywhere near enough troops." Romney said he supports adding at least 100,000 troops to the military.