[['Serbian Progressive Party Српска напредна странка / Srpska napredna stranka', 'LEADER', 'Aleksandar Vučić'], ['Serbian Progressive Party Српска напредна странка / Srpska napredna stranka', 'MPS', '134 / 250']]
The Serbian Progressive Party, led by Prime Minister Aleksandar Vučić, is the dominant party in parliament, with 134 out of 250 seats.