Bud "Egil" Krogh & Bob Haldeman were President Richard Nixon's assistants. 

See video below. 

"Elvis Meets Nixon" 1997.

https://youtu.be/HdS-eYlgF2M

Bud "Egil" Krogh. President Nixon's Secretary. A fan of Elvis and let him in to see the president on an unannounced visit.

1971, Bob Haldeman approved the unannounced Elvis meeting with President Nixon, which began the "War on Drugs" in the USA. 

Bud Krogh's book, The Day Elvis Met Nixon.

President Nixon looks toward his secretary, Bug Krogh. 

Most asked for picture in the National Archives: Elvis Meets Nixon.