There isn't any provision to expel a member state, but TEU Post 7 delivers for that suspension of specific legal rights. Introduced during the Treaty of Amsterdam, Post seven outlines that if a member persistently breaches the EU's founding rules (liberty, democracy, human legal rights and so on, outlined in https://connerzlqxd.topbloghub.com/35865642/the-smart-trick-of-member-4d-that-no-one-is-discussing