How are presidents selected?

they are selected when citizens of a nation vote for them to be elected, by popular demand of the people(democracy) i hope that helps

The people from each state vote for president and when the election is over in that state the president with the most votes win there and get electoral votes (electoral votes are from each county like California having 54 electoral) then the person with the most electoral votes is president (this process is really confusing)

hello,

i'm not so sure but i hope this in anyway.

the president of russia is head of state, and of a multi-party system with executive power exercised by the government, headed by the prime minister, who is appointed by the president with the parliament's approval.

hope this : )