The Alternative für Deutschland party now holds the position of largest opposition bloc in the parliaments of Saxony, Thuringia, and Brandenburg simultaneously — a first in post-reunification German history. The development follows a series of state-level by-elections triggered by coalition collapses in all three legislatures. Political analysts note that the AfD's eastern dominance increasingly constrains the federal government's ability to govern the former East German states through mainstream coalition partners. Chancellor Friedrich Merz's CDU has maintained its formal firewall against cooperation with the AfD, but three CDU state parliamentarians have broken ranks in procedural votes in the past month.