Silvio Berlusconi, Italian prime minister, has won back-to-back votes of confidence in the Italian parliament but has been left with a razor-thin majority that will make it hard for him to govern effectively. In the second and most dramatic of Tuesday's votes, Berlusconi survived a no-confidence motion in the lower house by three votes. Voting was briefly interrupted after scuffles broke out during the tense session. Earlier in the day, Berlusconi had secured a more comfortable victory in a confidence vote at the Senate.