Slovenia's incumbent government, led by right-wing nationalist conservative PM (the one who congratulated Trump) Janez Janša, lost its majority and might face a no-confidence vote.
All the government changes in the last 15 years (Parties: SDS - national conservative, SD - social democratic, NSi - christian democrat, LDS - liberal, Zares - liberal, GVL - liberal, PS - liberal, SMC - liberal, SAB - liberal, LMŠ - liberal, DeSUS - Pensioners' interests, SLS - conservative, SNS - nationalist, Levica - left).
Why?
Late, but most of those are personalist parties based around a single person, at least the ones that ran in 2018. The parties that contested the 2018 election of those include:
SMC: Modern Centre Party; but formerly called "Party of Milo Cerar"
SAB: Party of Alenka Bratušek, formerly the Alliance of Alenka Bratušek
LMS: List of Marjan Šarec