2. organized around common interests and goals to
compete with each other during elections

Political Parties

Explanation:

Political Parties are organizations that attempt to get people into positions of political power, the purpose of which is to advance their beliefs, goals and agenda on how things should be done.

As such, the members of political parties join them because they believe and share the goals and agendas of the party in question and would like to see those agendas prevail.

Different political parties will typically have varying beliefs on how things should be done such that they will compete with one another during elections to get their preferred candidates into power so as to push the party agenda.