Former Italian interior Minister Roberto Maroni, left, uses a broom bearing his Northern League party symbol to mimic a clean up in the party as party founder Umberto Bossi looks on, background right, during a rally in Bergamo, Tuesday, April 10, 2012. The founder of Italy's Northern League is denouncing as a plot the probe by prosecutors into the alleged embezzlement of party funds that triggered his resignation. Bossi, whose support kept Silvio Berlusconi in power in three governments, quit as party leader last week. He has denied using party funds for personal use. He told the rally it was "obvious" that party leaders are the "victims of a plot.