Please tell me if these are correct
When the American media report on the American president do they write "President has made the decision to..." ? [so no articles and upper case for the first letter at all times. And the context makes it clear that the reference pertains only to this one.] THE SAME WAY that employees under the [one and only] manager in a company would speak of the manager as "Manager" (e.g. Manager said that you should file those papers). And this manager would also refer to himself as "Manager" -- that how the manager in the British " the office" calls himself, which stands in contrast to the American version where they would, I think, always, use "the manager" or "the assistant to the regional manager" whom Dwight would be.
Let's say the election for president of the US are about to start. In this case, can we say: "all those who want to become president should candidate" [I think we need "the" before "president" [?]. But I believe we should be able to say when someone has been elected president -- "XYZ has been elected President" [so no article. And upper case?]
So does it work like that? This is me putting together some of my doutful observations and some vague research I did in the past.