ROME, Nov 3 (Reuters) - Italian Prime Minister Silvio Berlusconi has said a suicide bomber was plotting to blow him up in a soccer stadium, and he accused his domestic political opponents of exposing Italy to terror attacks. "I am the subject of a direct threat. A suicide bomber in a stadium aiming for me," Berlusconi told Italian newspaper Libero in an interview published on Thursday. "But it is not a question of me. We're also talking about Italy. Aren't people worried about this?" he added in what the conservative daily called a furious and bitter outburst. "We are talking...