The party's best electoral result was in the
1953 general election, when the party scored 6.9% and came fourth after Christian Democracy, the
Italian Communist Party and the
Italian Socialist Party. In 1954 the party suffered a major split led by
Achille Lauro, mayor of
Naples from 1952 to 1957, who formed the
People's Monarchist Party (PMP), which was closer to Christian Democracy. In the
1958 general election, the PNM won 2.2% of the vote, while the rival PMP 2.6%. In 1959 the two monarchist parties joined the
Italian Democratic Party (PDIUM). ==Electoral results==