This chapter examines the European Union because of Brexit, focusing on a number of transitional problems that the withdrawal of the United Kingdom from the EU—and its delay owing to subsequent requests to extend EU membership for extra time—posed for the EU’s functioning and funding. In particular, it emphasizes the consequences of Brexit for the composition of the 9th European Parliament (2019–2024), and its elections in May of 2019. It explains how the participation of the UK in this democratic process had pro tempore effects on both the EP outlook and its electoral outcome. The chapter also considers the transitional institutional challenges faced because of Brexit by both the European Commission and the Council of the EU. It highlights the implications of Brexit for the EU’s multi-annual financial framework (MFF), stressing how the UK’s withdrawal created a budget gap for the EU, attributable to the way the EU is funded, and how this would create challenges in the next MFF negotiations—as indeed happened.