There's no provision to expel a member condition, but TEU Posting seven presents for that suspension of specified rights. Introduced during the Treaty of Amsterdam, Posting 7 outlines that if a member persistently breaches the EU's founding principles (liberty, democracy, human legal rights and so forth, outlined in TEU Report https://member4d39647.blogtov.com/10006188/not-known-details-about-rtp-member4d