It's OK for a President to lie as long as he's not under oath?
Man, that is soooo wrong! A President takes on oath on Inauguration Day:
"I do solemnly swear (or affirm) that I will faithfully execute the office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States."
Do you think that chronic lying is the way to "faithfully" execute the office of President? How well did that work out for Nixon? How about LBJ, whose lack of faith with the American people over Vietnam has eclipsed any credit he might've gotten for things like his Great Society?
Perhaps the word "faith" is confusing to Bush; he may be misinterpreting it as religious belief. That'd be wrong as well as self-serving. Faith in the context of an oath is consistent with other usages of the word in the Constitution, such as "full faith and credit". It means trustworthiness, Sam, it means making a good faith effort and it means keeping faith.
The duties of a President do not include routinely lying to the American people.