Rome, January 20 - Premier Matteo Renzi on Wednesday praised former president Giorgio Napolitano, saying the reformist drive his government has embarked on would not be possible without him. Renzi referred to Napolitano's speech in 2013 after Napolitano reluctantly agreed to be re-elected for an unprecedented second term and blasted Italy's political class for not addressing the country's problems. "If it had not been for that speech in April 2013, this reform would not exist and this parliamentary term would not be running," Renzi told Senators ahead of a vote on the government's bill to change the Constitution to overhaul Italy's political machinery.