Political parties influence national policy-making primarily through their platforms, which outline their positions on key issues. Parties mobilize support by framing debates and galvanizing public opinion, allowing them to push their agendas. They also play a vital role in selecting candidates for elections, which can determine legislative majorities. Through party discipline, members often vote in alignment with party lines, impacting policy outcomes. Consequently, political parties are essential actors in shaping governance and directing national priorities.