No, Blackcatter, he was in danger. Word gets out, mortar rounds or rockets land, Cheney becomes President. As for your implication that all of the active duty military supports Bush ("Bush talking to active duty military is like the Pope talking to his cardinals") is no more accurate than that during Vietnam all the soldiers were kill-crazy baby-killers.
I disagree with the invasion of Iraq and I don't like Bush and Co. But the danger was there for him, and it was greater than it usually is for a sitting President or any other head of government.
EVERYONE in a combat zone is in danger, military or civilian, President or Private.