If you are reffering to a name, first letter, movie, or book, then yes.
No, you don't.
No, unless it is at the start of a sentence.
when do you capatilize the title President
Yes and No depends on the sentence
Usher's full name is Usher Terry Raymond IV
Yes Major League Baseball because it's a subject
its called 'yeah' by usher or papers
Usher full name is Usher Terry Raymond IV
Usher Raymond III
No
I have nothing on usher
No, Usher was supposed to be Usher.