US Republican Senator Mitt Romney has revealed he uses a secret Twitter account under the name Pierre Delecto. In an interview with The Atlantic magazine on Sunday, the former presidential candidate admitted he had a "lurker" Twitter handle to follow the US political conversation anonymously. While he did not reveal its name, U.S. news site Slate posted an article speculating it could be Pierre Delecto @qaws 9876. Asked to confirm by a journalist, Mr. Romney said "C'est moi" ("It's me").....