From Paul Krugman's article "The Tax-Cut Con":

...the estate tax is a tax on the very, very well off. Yet advocates of repeal began portraying it as a terrible burden on the little guy. They renamed it the ''death tax'' and put out reports decrying its impact on struggling farmers and businessmen -- reports that never provided real-world examples because actual cases of family farms or small businesses broken up to pay estate taxes are almost impossible to find. This campaign succeeded in creating a public perception that the estate tax falls broadly on the population. Earlier this year, a poll found that 49 percent of Americans believed that most families had to pay the estate tax, while only 33 percent gave the right answer that only a few families had to pay.

So "Saddam = Osama" isn't the only lie the GOP Big Liars have persuaded Americans to believe.