The corruption scandal surrounding the Lega Nord has had predictable and severe consequences for the party's standing in the polls. Here's one estimate of how the party is faring. Click to see a larger version:
About this graph:
This graph is based on poll results publicly available at http://www.sondaggipoliticoelettorali.it/. It shows the top six parties over the relevant period. A smoothed line ("loess fit") is added to aid interpretation. The current values of that smoothed line are plotted at the end. The smoothed line does not (yet!) take account of variations in polling sample sizes or house effects.