- KDU-ČSL
- 2017 Christian and Democratic Union – Czechoslovak People's Party leadership election
- Social Democracy (Czech Republic)
- Freedom Union – Democratic Union
- European People's Party
- 2019 Christian and Democratic Union – Czechoslovak People's Party leadership election
- 2006 Christian and Democratic Union – Czechoslovak People's Party leadership election
- 2005 Christian and Democratic Union – Czechoslovak People's Party leadership election
- 2009 Christian and Democratic Union – Czechoslovak People's Party leadership election
- 2003 Christian and Democratic Union – Czechoslovak People's Party leadership election
