CDU and democratic center parties maintain formal non-cooperation resolutions with the AfD. As a result, AfD's plurality seats remain excluded from normal governing coalitions.
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Adjust any party seat count with the stepper. The hemicycle diagram, Sperrminorität veto warnings, and coalition metrics recalculate immediately.
Under German state constitutions (e.g. Thüringen Art. 79 & 88), key decisions require a two-thirds majority. Any single party holding more than one-third of seats (33.34%) possesses sole veto power over electing Constitutional Court judges, dissolving the Landtag early, and amending state constitutional law.
A political convention adopted by mainstream parties (CDU, SPD, Greens, FDP, BSW) refusing to form governing coalitions or formal executive pacts with the Alternative für Deutschland (AfD). When the AfD secures 30%+ of seats, excluding them forces atypical alliances like the Brombeer-Koalition (CDU + BSW + SPD).
By standing order tradition, the largest faction nominates the Landtag President (parliamentary speaker). If the parliament rejects the plurality party's nominee through secret ballot, constitutional procedures vary, frequently triggering legal review at state constitutional courts (Verfassungsgerichtshof).