Could the Democratic Party turn into a Liberal version of Lega Nord?

[Battista Minola 1616]

Your comparison to Lega Nord does not make sense.

And by the way Lega Nord has moved past "Northern chauvinism" much.

[Battista Minola 1616]

Also, the kind of resentment/chauvinism/call for autonomy the original post describes sounds like a very manufactured (or someone would say, astroturfed) thing, whereas a strain of Northern resentment at Southern Italians and vice versa has existed for a long time and predates Lega by decades or centuries.