The triennial Senate Elections of Pakistan were held on 3 March 2018 to replace 52 retiring senators - half of the Senate's strength - with the winning candidates serving six-year terms. Overall, Pakistan Muslim League (N) came out as the largest party, followed by the Pakistan Peoples Party and the Pakistan Tehreek-e-Insaf. The results of these elections were steeped in controversy due to rampant allegations of horse trading and vote-buying, which lead to the Prime Minister and opposition leader Imran Khan calling for reforms. Prior to this election, PML (N) candidates were declared as independents by the Election Commission of Pakistan owing to a Supreme Court judgment.