7 · Semi-presidential systems, and a contested category

The two clean types are not the whole world. Many countries run a semi-presidential system: a separately elected president AND a prime minister who answers to the legislature, both holding real executive power at once. It is the design that most resists a tidy label, which is exactly why it is the most instructive one to end Section 2 on.

The mechanism: two executives, sharing the job

A semi-presidential system has the parts of both other types running at the same time.

• A president, elected separately by the voters for a fixed term (the presidential part), and
• a prime minister and cabinet, who sit in the legislature and can be removed by a vote of no confidence (the parliamentary part).

Executive power is split between them, and the constitution (and practice) decides who does what. The term was coined by the French scholar Maurice Duverger, who defined a semi-presidential regime as one combining a popularly elected fixed-term president with a prime minister and cabinet responsible to parliament (Duverger, 1980). France under the 1958 Constitution of the Fifth Republic is the standard example: a president elected by the voters, plus a prime minister the president appoints but who must retain the confidence of the National Assembly (Constitution of 4 October 1958).

Cohabitation: the tell that a system is really semi-presidential

The sharpest feature to watch for is cohabitation: when the president belongs to one party and the legislative majority (and therefore the prime minister) belongs to another. In those periods the system tilts parliamentary, because the prime minister, backed by the hostile legislative majority, controls domestic policy while the president's power narrows. When the president's party also holds the legislature, the system tilts presidential. The same constitution behaves like two different systems depending on who controls the assembly, which is what makes semi-presidential genuinely its own category and not just "a bit of both."

The disagreement this lesson exists to teach

Scholars do not agree that "semi-presidential" names one coherent thing, and the honest teaching move is to lay the dispute out.

All three positions have serious support. Shugart and Carey's distinction matters because a president-parliamentary system, where the president can dismiss a premier who still holds the assembly's confidence, concentrates far more power in the president than the premier-presidential version does (Shugart & Carey, 1992). Robert Elgie, who cataloged these systems, defines them by the constitutional rules (an elected fixed-term president plus a premier and cabinet accountable to the legislature) precisely so the category does not dissolve into case-by-case judgment calls (Elgie, 2011). So is France "semi-presidential"? Yes under Duverger's and Elgie's rule-based definition; and the more useful answer names WHICH sub-type and notes that cohabitation makes it behave differently at different times. State the definition, name the dispute, keep them apart. This is comparative description, not legal advice.

Sources

• Duverger, M. (1980). A new political system model: Semi-presidential government. European Journal of Political Research, 8(2), 165-187.
• Constitution of 4 October 1958 (France). https://www.conseil-constitutionnel.fr/le-bloc-de-constitutionnalite/texte-integral-de-la-constitution-du-4-octobre-1958-en-vigueur
• Shugart, M. S., & Carey, J. M. (1992). Presidents and assemblies: Constitutional design and electoral dynamics. Cambridge University Press.
• Elgie, R. (2011). Semi-presidentialism: Sub-types and democratic performance. Oxford University Press.