Who is the priminaster of USA?

There is no Prime Minister in the U.S.A.,

The President of the USA is an Executive President. That means he sets in motion the laws and acts of congress.

The president arbitrarily appoints a Secretary of State, A Defence Secretary, A Finance Minister, nd a Home Affairs Secretary. The president is elected into office, The various secretaries are appointed at his request. When the president leaves office, then these various appointments also styand down.

Other countries have a non-executive president, where upon a Prime Minister is appointed.

As republics, The USA and France have executive head of state (presidents).

However, The Republic of Ireland and Germany have non-executive head of state(presidents) . In Ireland there is a Prime Minister, and in Germany the prime minister is called the 'Bundes Kancellar'. (State Chancellor).