Lyndon Johnson: 20 - 23 October 1966 (Canberra, Melbourne, Sydney, Brisbane, and Townsville) and 21 - 22 December 1967 (Melbourne)
George Bush: 31 December 1991 to 3 January 1992 (Sydney, Canberra, and Melbourne)
Bill Clinton: 19 - 23 November 1996 (Sydney, Canberra, and Port Douglas)
George W Bush: 22 October 2003 (Canberra) and 2 - 5 September 2007 (Sydney)
Barack Obama: 16 - 17 November 2011 (Darwin and Canberra)
Billy Graham visited Australia in 1959.
Richard Nixon in 1974.
10
approximately, 12.
Canada. Historically all new American presidents visit Canada first.
one
all
All of them actaully.
6
barack obama
JFK.
some