ROME (AP) — Although Italy’s Silvio Berlusconi resigned in disgrace a year ago, has since been convicted of tax fraud and now faces plunging poll numbers, the media baron is showing he still has the power to put pressure on his successor, Premier Mario Monti.

With Europe still deep in its debt crisis, it doesn’t take much to make the markets nervous. That’s what happened Thursday when the 76-year-old Berlusconi withdrew his party’s support for Monti’s government, threatening a premature end to its ambitious reform program.