5Star Movement leader Luigi Di Maio | Alberto Pizzoli/AFP via Getty Images Italy’s 5Stars leader renews push for coalition with PD Luigi Di Maio says his protest movement and previous ruling party share positions on the EU, health care and more.

Luigi Di Maio, the leader of Italy's populist 5Star Movement, made a fresh attempt on Sunday to break the post-election political deadlock and woo the Democratic Party (PD) into forming a governing coalition.

In a letter published by Corriere Della Sera, Di Maio highlighted policies on which both parties could see eye to eye, including the importance of keeping Italy within the European Union and pushing Brussels to tackle tax avoidance.

"I am confident [that] there are many points of convergence that go toward meeting our citizens' needs, which is our only interest," Di Maio wrote.

Both parties also agree on the need to reform EU migration rules to ensure the burden of arrivals falls more evenly across European countries as well as the importance of improving Italy's health care system and streamlining bureaucracy, he claimed.

The populist leader's overture is part of a repeated call on politicians to set aside traditional rivalries to form a working government after Italy's inconclusive March 4 election left no single party or coalition with enough votes to form a government outright.

The PD vowed after the election it would remain in opposition. But its interim leader, Maurizio Martina, on Tuesday signalled it was open to entering into a coalition with the populist party if it broke off ties with the center-right coalition made up of Matteo Salivini's far-right League and Silvio Berlusconi's center-right Forza Italia.

The party is deeply divided on the issue, however. Il Sole 24 Ore has reported that Former Italian Prime Minister Matteo Renzi — who still holds considerable influence over the PD despite stepping down as leader after the election — is expected to call on members to oppose a coalition with the 5Stars in a television interview Sunday evening.