Lyndon Johnson actually said...
I can't be happy over Walter Heller's departure from Washington, leaving the Council, and at the same time I am very happy and, of course, couldn't be unhappy over the strength that he has left behind on this Council.
Context
Remarks at the Swearing In of Gardner Ackley as Chairman and Arthur Okun as Member of the Council of Economic Advisers
11/15/1964