corrente

A: You! Go change that lightbulb!

Of course, there are more such jokes—but there can't be too many. Ridicule is an excellent weapon against tyranny.

From alert reader stradiotto:

Q: How many Republicans does it take to screw in a lightbulb?
A: None! The failed policy of appeasing the darkness has brought us enough trouble.

From alert reader mjs:

Q: How many Republicans does it take to screw in a lightbulb?
A: The White House does not release information that may jeopardize the security of the United States.

From alert reader agitpropre (slightly edited)

Q: Mr President, Howard Dean has said lightbulbs burn out, that they can actually cease to provide light. Can you comment?
A: He is entitled to his opinion. But when it comes to lightbulbs, actually changing lightbulbs. I am the one who has to make the tough decisions.

From alert reader NTodd:

Q: How many Republicans does it take to screw in a lightbulb?
Scott McClellan: I am not aware of any issue with lightbulbs at this time. I suggest you ask the people in charge of changing the lightbulbs. We have always said the White House will work closely with the lightbulb changers to make sure America is safe and well-lit.

From alert reader Flory:

Q: How many Republicans does it take to screw in a lightbulb?
A: What difference does it make?

From alert reader bizutti (slightly edited):

Q: Secretary Rumsfeld, just how many Republicans does it take to screw in a lightbulb?

Rumsfeld: You see, there are lights that we know don't light, and there are lights that we don't know don't light. What makes you think that we can predict which kind your [waving hand imperiously] so-called hypothetical light bulb is referring to?

From alert reader emal (slightly edited)

Q: How many Republicans does it take to screw in a lightbulb?
A: At least 3:

1 to give the order
1 to award the non-competitive/no bid government contract
1 to have a financial relationship or connection to the company awarded the contract, such as CEO, past/current president or board member,substantial pension/stock options in said company. This person may also be a former government employee whose family is closely connected with person number 1 or his administration, or may be a large donor to the election campaign of person number 1.

UPDATE: People seem to have having fun with this, so I'm moving it up.
UPDATE: Ditto, ditto.
UPDATE: Ditto, ditto. Thanks to farmer for inspired "dim bulb" graphic! (I missed the "43W" the first time).
UPDATE: Ditto, ditto, ditto. I'm still trying to work out the one that goes, "Republicans don't screw in a lightbulb, they screw in a"—gotta get that parallelism in there, or "Republican's don't screw. They"—but I can't quite get it right.... In any case, all contributions gratefully recieved....