Is it necessary to add one or two commas before and after as someone?

[compiler]

Which one is correct, "he, as a president, made the decision" or "he, as a president made the decision?"

In addition, should a question mark be inside or outside of the quotation marks, "...decision"? or "...decision"?

Thank you for your answer.

[emsr2d2]

Which one is correct?

"He, as a president, made the decision" or "He, as a president made the decision".

In addition, should a question mark be inside or outside of the quotation marks, "...decision"? or "...decision"?
See above. The question mark needed to be after "Which one is correct".

Thank you for your answer. Unnecessary. Thank us after you receive answers, by clicking on the "Thank" button.

See above.

You need both commas as shown in your first suggested sentence.

[Tdol]

"...decision"? or "...decision"?
See above. The question mark needed to be after "Which one is correct".

Would AmE speakers feel the same about decision?

[SapphireAlena]

Which one is correct, "he, as a president, made the decision" or "he, as a president made the decision?"

In addition, should a question mark be inside or outside of the quotation marks, "...decision"? or "...decision"?

Thank you for your answer.

"[A]s a president,"is an appositive. Depending on the relationship to the noun to which it refers will determine the necessity for it to be set off by a pair of commas.

In this example, the stress can be on the fact that he is president, in which case, set off the appositive phrase with a pair of commas.

You can also place the stress on the fact that by the authority of being president he made the decision, in which case you will omit the commas.

If you use the commas, you need two commas—one before the appositive phrase and one after it. (If an appositive ends a sentence, you will omit the last comma and replace it with the appropriate end mark.)

NOTE: In the case of an appositive following a proper noun (such as a name), you almost always will use the commas.

[GoesStation]

Which one is correct, "he, as a president, made the decision" or "he, as a president made the decision?"

In addition, should a question mark be inside or outside of the quotation marks, "...decision?" or "...decision"?

Would AmE speakers feel the same about decision?

I moved the first question mark in your second sentence. The question mark should not go inside the quotation marks because it is not part of the quoted text. [EDIT] I'm an American.