"We are pleased with the outcome of the referendum as well as Renzi's decision. He lost. It is time to get up and hold new parliamentary elections as soon as possible," Grimoldi told RIA Novosti.
With 84 percent of the ballots counted, preliminary results suggest that almost 60 percent voted "no," while just over 40 percent voted in favor of Renzi's reforms.
The results hail a victory for the people against the bankers, big finance, media and EU technocrats, the lawmaker said, adding that Italians must choose the next government which will serve the interest of the people.
"As soon as we have a normal government, the country will see stability, we will resolve our problems and the interests of our people will come first," Grimoldi said.
Renzi vowed to step down later on Monday. Lega Nord and the anti-establishment Five Star Movement have been campaigning against prime minister’s constitutional reforms.