Feature/Country	US	GB	Fr	Brazil	Russia	China	Iran
Head of state	President	Monarch	President of Republic	President of Republic	President	President	President/Supreme Leader
Head of govt	President	Prime Minister	PR and Premier	President of Republic	Prime Minister	Premier	President/Supreme Leader
Head of govt selection process	Popular election, electoral college	Party majority in House of Commons selects	PR selects with majority support from National Assembly	Popular election	Popular election	National People's Congress elects	Popular election
Govt with automatic majority support?	No	Yes (mostly)	Yes, but PR can be of different party than majority	No	Yes, but PR can be of different party than majority		Yes, but PR can be of different party than majority
2 or multi-party?	2 party	2 party+	Multi-party	Multi-party	Multi-party	Single party	"Approved" parties
Legislative chambers	House of Representatives and Senate	House of Commons and House of Lords	National Assembly and Senate	Chamber of Deputies and Senate	State Duma, Federation Council	National People's Congress
Federalism	Yes	No	No	Yes	Yes	No	No