House GOP demands briefing on White House security procedures after cocaine scandal

In his letter to Secret Service Director Kimberly Cheatle, Comer called the existence of illegal drugs in the iconic government building "shameful," and questioned how the substance was able to make it past security in the first place.

"This alarming development requires the Committee to assess White House security practices and determine whose failures led to an evacuation of the building and finding of the illegal substance," Comer wrote, calling on the Secret Service to provide additional information.

He went on to call the incident an "unacceptable and shameful moment in the White House's history," pointing out that it "raised additional concerns ... regarding the level of security maintained" there.

Comer asked Cheatle to provide him with a "staff level briefing" on the matter no later than July 14. He reminded her that because the House Oversight Committee was the overseer of the House of Representatives, he had the authority to "investigate 'any matter' at 'any time' under House Rule X."

The white powder was first discovered on Sunday. Since then, there has been speculation regarding not only how it made its way into the White House, but to whom it belonged.

A source familiar with the Secret Service investigation suggested on Friday that while forensic testing had been done, pinpointing the cocaine's origins would be "very difficult ... because of where it was."

"Even if there were surveillance cameras, unless you were waving it around, it may not have been caught," they explained. "It's a bit of a thoroughfare. People walk by there all the time."

White House Press Secretary Karine Jean-Pierre noted during a briefing this week that the Biden family, including Hunter, was at Camp David when the baggie was found. The president's son, who has been open about his history of addiction, was present at the White House last week.