Q: How can you tell when a Republican is lying?

A: His lips are moving.

Yeah - old joke.
Some of my favorites:

Saddam has operational ties with al Qaeda.

Iraq has WMD.

My favorite from this era:

President Bush pledged anew Friday that Osama bin Laden will be taken "dead or alive" ...

W pledged! - Guess we know what W's word is worth!!!

Today?

Obama's "death panels".

Why do they lie... all the time... about everything???

I suspect the simplest answer is the best: They lie because nobody would support 'em based on the truth!

Their lies all have something in common: all their lies are designed to scare us! - that's how Republicans want to rule, by keeping us afraid of everything all the time!
If we're afraid, then they can pretend to protect us.

One of the best brief descriptions of this strategy is from a fictional speech, delivered by President Andrew Shepherd in The American President" [1995]:

We have serious problems to solve, and we need serious people to solve them. And whatever your particular problem is, I promise you Bob Rumson is not the least bit interested in solving it. He is interested in two things, and two things only: making you afraid of it, and telling you who's to blame for it. That, ladies and gentlemen, is how you win elections.

That about sums up the Republican world-view: make us afraid & tell us who to blame.

For everything.

The sad thing is, this strategy works!!!

When will we stop drinking the Republican Kool-Aid?