[Oyk]

We send PM, Indo send president leh

In the US there's no Prime Minister. The President calls the shots. 

In China there's a Prime Minister but it's also the President who calls the shots. The Prime Minister there can be called Secretary of State just as well, or the President's Private Secretary which is also fine but we know who's the boss.

Malaysia, Thailand and Japan do not have a President. They have a King instead. Japan is even more atas. They call him Emperor. But it's the Prime Minister there who runs the government.

Singapore has a President but he is not a King or Emperor, and he does not run the government or has any role in making laws, much as the 39% had wished when voting for TKL.