The anti-establishment Five-Star Movement and the far-right League party could campaign together in fresh national polls and their platform would be based on the joint anti-austerity agenda they drafted this month, Adnkronos learned from Five-Star sources on Monday.
League leader Matteo Salvini however dodged reporters' questions on a possible electoral alliance with Five-Star.
"I'll have to think that through with a clear head," Salvini said, while praising the Five-Star politicians he worked with this month to hammer out a common programme of government.
"I found them to be serious, sensible people, who kept their word, " Salvini stated.
An electoral alliance with the League would mark a total reversal of policy for Five-Star, which has previously shunned alliances with other parties.
Five Star and the conservative alliance led by the League were the biggest winners in Italy's 4 March national election in which no party or bloc gained an outright majority.
On Monday, Italy's president Sergio Mattarella invited a pro-austerity economist, Carlo Cottarelli, to form a caretaker technocrat government after populist premier designate Giuseppe Conte resigned when Mattarella vetoed his choice a eurosceptic economist as finance minister.
If Cottarelli's proposed cabinet line-up fails to pass a parliamentary confidence vote, fresh elections will take place as soon as September, Cottarelli said on Monday. If he wins a confidence vote, his caretaker cabinet will oversee the 2019 budget and fresh polls will be held early next year, Cottarelli said.
Five-Star and the League - which together have a parliamentary majority in both houses - have vowed not to back Cottarelli and his proposed government in confidence vote.