Arnold Schwarzenegger has said he would make a "great" US president - while adding he believes American politics needs an injection of younger blood.The bodybuilder-turned-actor-turned-politician discussed his presidential potential in an interview with the BBC, while visiting London this week to promote his new book Be Useful: Seven Tools for Life.US constitution states any president must be "a natural-born citizen of the United States", ruling out Schwarzenegger who was born in Austria before moving to the US as young man and gaining dual citizenship.But the 76-year-old told the BBC: "I feel like I would make a great president."But I feel that, at the same time, everything I've accomplished was because of America," he added."America gave me so many opportunities and the American people were so embracive, and they just received me with open arms. There was no one there that stopped me from my success.