[11] In the run-up of the 2018 general election there was a debate on the creation of a "fourth leg" of the centre-right coalition, whose three members were Forza Italia (FI), Lega Nord (LN) and the Brothers of Italy (FdI).

The process started when Enrico Costa, a FI dissident who had been a minister in Paolo Gentiloni's centre-left government, resigned from his post and left his party, Popular Alternative (AP),[12][13][14] to form a "liberal centre" in alliance with FI.

On 5 January 2018 it was the turn of IdeA, which was persuaded by the federative character of the list and the more distinctive Christian-democratic identity, both thanks to UdC's presence.

Progressively, other minor groups, notably including the South American Union of Italian Emigrants (USEI), the Alliance of the Centre (AdC), the Moderates in Revolution (MiR), the Schittulli Political Movement (MPS) and Renaissance were merged into NcI or became associate parties.

After a brief alliance with Cambiamo!, since February 2021 the party's sub-group within the Mixed Group of the Chamber has been named "Us with Italy–USEI–Renaissance–AdC" and has featured five members: Lupi (a Christian democrat), Colucci (a social democrat) and Tondo (a liberal) of NcI, Eugenio Sangregorio of the USEI and Vittorio Sgarbi of Renaissance.

[39] In the run-up of the 2022 general election, NCI first formed a joint list with Italy in the Centre (IaC),[40] then it was a founding member of Us Moderates (NM), a broader joint list within the centre-right coalition, along with IaC, the UdC and Coraggio Italia (CI).