This article/blog does some fact checking on Barack "Toom Tabard" Obama's recent advertising.
There are some real factual problems with this ad, which is titled “Dos Caras,” or two faces.Frankly, Limbaugh leaves himself wide open for such abuses. I can't stand Rush. I find him as offensive as any of the lefty talking heads. But, that's because I think he commonly does the same thing with distorting reality. Funny thing about reality is that we all have our own. Rush and Obama have very different versions, but neither of them sit close to where the majority of American's live.
First of all, tying Sen. McCain – especially on the issue of immigration reform – to Limbaugh is unfair.
Limbaugh opposed McCain on that issue. Vociferously. And in a larger sense, it’s unfair to link McCain to Limbaugh on a host of issues since Limbaugh, as any even occasional listener of his knows, doesn’t particularly care for McCain.
Second, the quotes of Limbaugh’s are out of context.
Read the whole thing. It's pretty informative.