The answer is SEVEN:
One to deny that a lightbulb needs to be replaced.
One to attack and question the patriotism of anyone who asks questions about the lightbulb.
One to blame the previous administration for the need of a new lightbulb.
One to arrange the invasion of a country rumored to have a secret stockpile of lightbulbs.
One to get together with Vice President Cheney and award a one million dollar no-bid contract to Halliburton Industries for supplying a lightbulb.
One to arrange a photo-op session showing Dubya changing the lightbulb while dressed in a flight suit and wrapped in an American flag.
And finally one to explain to Dubya the difference between screwing a lightbulb and screwing the country.
Source: monochrom bagasch