Estonian Prime Minister Kaja Kallas has resigned to become the European Union's foreign policy chief, a position she will assume later this year. Kallas, the first female prime minister of Estonia, led the country through various crises, including the pandemic, economic recession, and Russia's aggression in Ukraine. While Kallas will continue as the caretaker prime minister until early August, the Reform party has nominated Climate Minister Kristen Michal as the potential new prime minister, pending coalition negotiations. The new government is expected to be sworn in by the end of July or early August, maintaining Estonia's political stability during this transition period.