The director of the Secret Service acknowledged in an interview aired Friday that the agency's staffing is not "adequate."

In an interview with CBS News's Major Garrett, Secret Service Director Randolph "Tex" Alles said that his office understands that staffing in the agency charged with protecting the president is not up to par.

Presented with statistics that the Secret Service lost 10 percent of its workforce between 2011 and 2015 "due to budget constraints and attrition," Alles acknowledged the issue.

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"I think we understand that the sizing of the agency is not currently adequate," Alles said.

Secret Service agents have bumped up against federal overtime pay caps in President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's first year in office. USA Today reported in August that the agency could no longer pay hundreds of agents because of the resources needed to protect Trump and his family.

Trump and his family have multiple residences across the East Coast, increasing the size of the Secret Service's protective mission.