Three-bloc parliaments break cohabitation

Cohabitation worked in France when one opposition party held a majority; it fails when parliament is split into three roughly equal blocs. In such a configuration, no prime minister can assemble stable backing, and a president’s centrist project collapses between left and right. — Tri‑polar fragmentation undermines semi‑presidential bargains and suggests constitutional or electoral reform is needed wherever party systems fracture beyond two blocks.