Daniel_

A President is head of state = he (or she) PRESIDES oer the country.

A Prime Minister is head of a parliament = he (or she) has to carry the vote in cabinet, and on the floor of the house.

In Canada (and the UK, where I am from) the Queen is the Head of State. In both countries the true power rests with the government, and in the UK the Prime Minister exercises the "Royal Prerogative" and can go to war on the Queens behalf, and pass certain amendments to laws using the "Order in Council" process.

Fundamentally however, if the title is "Prime Minister" it is rude to use the wrong title. If GWB was called "Dictator" or "King" or "Tzar" of the "Unified Territories of America" the Marines might just be sent in...

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Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
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