SYRIZA has since overtaken PASOK as the main party of the centre-left . Alexis Tsipras led SYRIZA to victory in the general election held on 25 January 2015, falling short of an outright majority in Parliament by just two seats. The following morning, Tsipras reached an agreement with Independent Greeks party to form a coalition, and he was sworn in as Prime Minister of Greece. Tsipras called snap elections in August 2015, resigning from his post, which led to a month-long caretaker administration headed by judge Vassiliki Thanou-Christophilou, Greece's first female prime minister. In the September 2015 general election, Alexis Tsipras led SYRIZA to another victory, winning 145 out of 300 seats and re-forming the coalition with the Independent Greeks. However, he was defeated in the July 2019 general election by Kyriakos Mitsotakis who leads New Democracy. On 7 July 2019, Kyriakos Mitsotakis was sworn in as the new Prime Minister of Greece. He formed a centre-right government after the landslide victory of his New Democracy party.