The Pakistan People's Party is a centre-left political party in Pakistan. It is currently the first-largest party in the Senate and third-largest party in the National Assembly. The party was founded in 1967 in Lahore, when a number of prominent left-wing politicians in the country joined hands against the military rule of president Muhammad Ayub Khan, under the leadership of Zulfikar Ali Bhutto. It is affiliated with the Socialist International. The PPP's platform was formerly socialist, and its stated priorities continue to include transforming Pakistan into a social-democratic state, promoting egalitarian values, establishing social justice, and maintaining a strong military. The party, alongside the Pakistan Muslim League-Nawaz and the Pakistan Tehreek-e-Insaf, is one of the three largest political parties of Pakistan.

The Senate of Pakistan or Aiwān-e-Bālā Pākistān, constitutionally the House of the Federation, is the upper house of the bicameral Parliament of Pakistan. As of 2023, It has a maximum membership of 96, of which 92 are elected by the provincial legislatures using single transferable vote. Four represent the Federal Capital. Members sit for terms lasting six years, with half of the house up for election every three years. Unlike the National Assembly, the Senate is a continuing chamber and hence not subject to dissolution.