"The grand manoeuvres continue by those who say they want a new electoral law but in practice don't want one, and waste time," said the former prime minister on Facebook.
The PD is proposing an adjusted version of the German election system, with 50 per cent of seats delegated on the basis of proportional representation and the rest according to the first-past-the-post voting system.
Northern League MP Giancarlo Giorgetti affirmed that his party welcomes the PD's proposal, stressing that the League is eager to act swiftly to approve a new law and move forward.
"Our top priority is in any case always the same: vote as soon as possible, stop all the idle chatter and time-wasting," Giorgetti added.
On the other hand, anti-establishment 5-Star Movement (M5S) slammed the PD’s proposal, saying it embodied a scheme suggested by centre-right ALA leader Denis Verdini, a former close aide of Silvio Berlusconi who split from the ex-premier's Forza Italia.
Forza Italia's Francesco Paolo Sisto also rejected the proposal, saying it was drafted by Verdini and Renzi, while Berlusconi voiced his thoughts.
"An electoral law is needed that makes it possible for Italian votes to be accurately reflected in their representation in Parliament, avoiding majority bonuses," the Forza Italia leader said.
PD Deputy Chief Maurizio Martina responded by saying that Italy needs a system that favours the majority.
“We will discuss everything and engage in a serious exchange of views, but safeguarding the majority basis is in the country's best interest," he concluded.