In late December the centrist post-NCD Popular Alternative (AP), which had been a key coalition partner for the PD, divided itself among those who wanted to return into the centre-right's fold and those who supported Renzi's coalition.
Two groups of AP splinters (one led by Maurizio Lupi and the other by Enrico Costa), formed along with Direction Italy, Civic Choice, Act!, Popular Construction and the Movement for the Autonomies, a joint list within the centre-right, named Us with Italy (NcI). The list was later enlarged to the Union of the Centre, the Union of Democrats for Europe and minor parties.
The remaining members of AP, Italy of Values, the Centrists for Europe, Solidary Democracy and minor groups joined forces in the pro-PD Popular Civic List (CP), led by Minister of Health Beatrice Lorenzin.
On 28 December 2017 President Sergio Mattarella dissolved Parliament and a new general election was called for 4 March 2018.
Voters will elect the 630 members of the Chamber of Deputies and the 315 elective members of the Senate of the Republic for the 18th legislature of the Republic of Italy, since 1948.