Seats projected by demographic reach and regional support each turn.
45 seats, apportioned by share of 3,391,556 votes cast.
Why IT_SUD voters lean toward Pietro Serra over Aldo Colombo. Each driver is signed: + = lift, − = drag. Drivers are relative within this list and only move the persuadable slice of each party's vote, so their real effect is small. Coattail rows are direct share tilts in %. A raw vote lead does not equal the sum of these bars.
Ceiling this cycle: at most 20.0% of Aldo Colombo's vote can be persuaded across to Pietro Serra, and 20.0% of Pietro Serra's vote can be persuaded away. Registration lean sets the starting split and how hard a party is to move, not the final share. These drivers add up to 1.1 pts of that movable slice.