There is not a Prime Minister in the United States.
The head of state and head of government in the United States is the US president. Currently, this is Barack Obama.
The executive branch of the US is elected separately from the legislative branch, although they are related by their political parties. It is possible to have a President whose party does not hold a majority in Congress.
Americas' Prime Minister
Each country in North America and South America has its own political structure, with its own head of state. Canada and many other countries with a British parliamentary heritage have prime ministers.
As Prime Minister he is the Head of the Country similar to a President of the United States.
The United States does not have a Prime Minister, they have a President. The current President of the United States is Barack Obama and he is 49 years old.
A Prime minister is the ruler of Canada. In the United States you have the President, here in Canada it is a Prime minister.
The Prime Minister of Canada has more power than the president of United States.
The United States has no prime minister. We have a President.
Australia did not have a Prime Minister until Federation in 1901 when all the states of Australia united.
The U.S. does not have the position of Prime Minister. In 1939, Franklin D. Roosevelt was the President of the United States.
Yes, Prime Minister Tojo was in favor of attacking the United States.
He stands in if the Prime Minister is overseas or indisposed - much the same as the Vice President in the United States.
Canada's Prime Minister office is similar to the office of President in the United States.
The US does not have a Prime Minister, there is an elected US President that is a similar office to a Prime Minister. The President of the US is Barack Obama at present (2011).
The current President (as of July 2012) is Barack Obama. The US doesn't have a prime minister.