Aprista Party primaries, 4199

The Aprista Party (APRI) of Istalia organized a series of internal elections on 5–7 April 4199, to elect its party leader, as well as its candidates for president and parliament. The party leader, Santino Musumeci, was re-elected for a four-year term. Musumeci was also nominated as the APRI candidate for President of Istalia, while Giuliano Dini was nominated for Prime Minister of Istalia for a second time. The Aprista Party also nominated 377 candidates for the Chamber of Deputies, and 70 candidates for the Senate.

Party leader
The party leader of APRI was chosen by a 200-member committee, representing the party's local and regional branches, as well as its members abroad, using the winner-take-all system. The leader ordinarily serves a term of at least four years, until when the next primaries are expected to be held. The party leader automatically heads the APRI list for the Chamber of Deputies. The elected leader will typically also serve as the default APRI candidate for prime minister, except when the leader runs in the presidential primaries. Party founder and moderate incumbent leader Santino Musumeci ran unopposed, securing the support of 200 (100%) of the 200 delegates.

Presidential candidate
The presidential candidate of APRI was chosen directly by the party membership, using the winner-take-all system; a total of 16,584 members were elibible to vote. In total, 6,425 (38.7%) cast a ballot. Party founder and moderate incumbent leader Santino Musumeci ran unopposed, and won 6,425 (100.0%) of the votes.

Candidate for Prime Minister
The APRI candidate for Prime Minister of Istalia is typically chosen by the party leadership. Giuliano Dini was selected as the party's candidate on 7 April 4199.