Renzi and Calenda with Bardi, the center returns to tip the scales. How much will IV and Azione's decision to side with Belli weigh on the outcome of the Regionals in Basilicata? Not only the parties in the running but also the pollsters are wondering this, but they underline the difficulty of making a prediction.

"It's premature to make predictions at the very least," agrees Lorenzo Pregliasco, director of Youtrend, a pollster.