On 31 October Milazzo set up a regional government formed by the political forces that had elected him, including PCI and MSI.

The vice president was Paolo D'Antoni, deputy for the Communist group, while Dino Grammatico and Ettore Mangano (MSI) were appointed Assessors for strategic Agriculture and for Industry and Commerce respectively.

The agreement was supported by the then communist regional secretary Emanuele Macaluso and the MSI group leader Nino Buttafuoco.

Called to Rome by the party's council of arbitrators to clear himself, Milazzo refused to resign and was expelled from the DC; after a few days, on 8 November 1958, with other dissident deputies, he founded the USCS;[1] it was the first example of breaking the unity of Catholics in politics.

In the subsequent regional election of 9 June 1963, the USCS suffered a severe defeat (0.8% of the votes and no seats), so after a short time it disbanded.