Estonian Prime Minister Kaja Kallas submitted her resignation to President Alar Karis at Kadriorg this morning. Minister of Climate Kristen Michal is set to replace Kallas as PM later this summer. Kaja Kallas is stepping down as Prime Minister to take up her new role as the European Union's High Representative of the Union for Foreign Affairs and Security Policy. Estonia bids farewell to a remarkable prime minister who elevated Estonia's global presence. The European Union will gain an outstanding leader as foreign policy chief.