It’s probably better to have him inside the tent pissing out, than outside the tent pissing in.
Lyndon B. Johnson (1908-1973) American politician, educator, US President (1963-69)
Quoted in David Halberstam, book review, New York Times (1971-10-31)
(Source)
Review of the just-published Lyndon Johnson, Vantage Point: Perspectives of the Presidency 1963-1969, regarding the difficulty for him to fire FBI Director, J. Edgar Hoover. Halberstam notes this as a Johnson quotation not found in the book, complaining that it's far too sanitized a retelling of Johnson's presidency. This is generally accepted as the earliest printed mention of the quotation.