Donald Trump speaks as Ben Carson looks on at a debate held by CNBC in Colorado on Oct. 28.  (Rick Wilking/Reuters)

During a lightning round of a debate, Republican frontrunner Donald Trump picked a potential Secret Service code name that was truly coded: HUMBLE. When the braggadocious billionaire starts to receive actual Secret Service protection Wednesday morning, agents plan to call him something a bit more fitting: MOGUL.

Trump reportedly picked that power-laden code name for himself from a list of options, all starting with the letter "m," that was provided by the Secret Service in consultation with White House Communications Agency. The code name will not be finalized until Trump's Secret Service protection begins at 8 a.m. Wednesday, so the name could still change overnight.

Ben Carson, the retired surgeon who has been surging in Republican polls, will also begin to receive Secret Service protection Wednesday morning. During the pick-your-code-name round of the September debate, Carson went for ONE NATION. Instead, Carson will become known as ELI to his handlers. Carson is a deeply spiritual man who frequently discusses his faith on the campaign trail, so Eli could be tied to the Biblical high priest whose two sons greatly disappointed him. Eli is also a Hebrew word meaning “heaven” or “ascent."

[Trump and Carson will both soon receive Secret Service protection]

Trump’s and Carson’s campaigns were given a short list of  four to five code names to pick from in meeting with the Secret Service on Monday. The candidates then got to chose their favorite. The names are generated not by the Secret Service but the White House Communications Agency, a military affairs unit inside the White House. The Secret Service uses a code name for each protected person, a handle that often connotes their profession, personality or reputation.

The Communications Agency and Secret Service began letting candidates and protectees have a say in choosing their handle in recent years after some didn’t much like their officially chosen code names. The most striking example was when George W. Bush was elected president and insisted that his code name from his time as the son of a president, TUMBLER, be changed to TRAILBLAZER.

[Donald Trump accuses Secret Service of putting politics above his safety]