the people that believe those things do not need another tape to convinvce them it's true.
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Not so. Obama won by razor thin margin in 2008 on a state-by-state basis. Had the media properly vetted Obama - that is, given issues like Rev Wright, Bill Ayers, etc. more than a cursory amount of coverage, as they would have for a Republican candidate - it is quite likely that he would not have been elected. Conservative bloggers are simply attempting to do the work that the MSM refuses to do.
if you believe that Obama is a sleeper agent working against the U.S.A. then i don't even really know what to say.
Liberals often engage in hyperbole such as this to dodge the real point. Nobody is talking about a "sleeper agent," but Obama was, and perhaps still is, a radical progressive, who's ideology runs counter to all but the hard left.