Occasionally, we receive emails expressing concern about how we refer to the President in our reporting. To address this, we consulted White House correspondent Mark Knoller for clarification.

Throughout my nearly two decades at CBS News, primarily focused on White House coverage, the most frequent topic of correspondence from our audience pertains to our use of the term “Mister” when referring to the President.

At CBS News, it is our standard practice to address the President and former Presidents as “Mister” on subsequent references. In contrast, all other political figures are identified by their last names after the initial mention.

This includes leaders such as Prime Minister Tony Blair, King Abdullah of Jordan, incoming Speaker of the House Nancy Pelosi, and Vice President Dick Cheney. In our reports, we will use their titles initially, but thereafter, they are simply referred to as “Blair,” “Abdullah,” “Pelosi,” or “Cheney,” without the addition of “Mister” or “Madame.”

However, this protocol does not apply to the President. When we refer to Mr. Bush in our radio and television broadcasts, it is intended as a mark of respect, although some may misconstrue it as a slight.

I have received inquiries questioning why I do not consistently refer to him as President Bush. The explanation is straightforward: it is poor writing practice.

For instance, consider this recent radio report regarding the President’s visit to the Pentagon:

In the Pentagon’s conference room known as “The Tank,” President Bush is meeting with senior civilian and military officials in an effort to formulate a new strategy for Iraq. However, White House spokesperson Tony Snow has indicated that it will be next month before Mr. Bush is prepared to unveil his revised approach.

SNOW: “The President has been clear that he wants to explore several options and is seeking more detailed answers regarding various strategies.”

Mr. Bush is also awaiting the swearing-in of Robert Gates as Secretary of Defense on Monday, who will then brief him on his planned trip to Iraq. Reporting live from the White House, I’m Mark Knoller, CBS News.

If I were to refer to him as “President Bush” in every instance, it would become jarring. By using “Mister Bush” on subsequent references, we aim to enhance clarity while still conveying our respect.

So, when you hear the term “Mister Bush,” please understand that it is not intended as disrespect. Quite the contrary, it is a reflection of our professionalism.