If you meet him, the only polite address is Mr. President or President ____. However, in talking about the president, he is often called by just his last name , initials or a nickname and I see nothing at all impolite at that.
a president that is in ofice
Death of a sitting president the Vice President becomes president, election, or by resignation and the Vice President again becomes president.
Spiro Agnew.
$250,000
one of the president maids they saw it sitting on the window sill one night
Sitting means "current" or "active" president. According to the smarties on StackExchange politics, it is acceptable, to call ex-presidents "Mister [lastname]", or "Former President", or even "Mister President" - even though they no longer have that role. Famously, Marilyn Monroe addressed a sitting member of the executive staff (President Kennedy) as "Mister President" in a happy birthday song, and most guys who listened to that.. well, their members were standing rather than sitting afterwards. ;)
The main roles are to be the formal President of the Senate and to become President if a sitting President dies, resigns, or is removed from office by the impeachment process.
$400, 000 annually.
Yes.
president
Theodore was the first sitting president to leave the country. He visited Panama while he was president.
A flag is flown at half-staff for 30 days for the death of a sitting or former President, 10 days for the death of a sitting Vice-President.