Many conservatives are furious over Newsweek's controversy-bait cover story by Andrew Sullivan, whose headline asks, "Why Are Obama's Critics So Dumb?"
Sarah Palin is taking it particularly personally, though.
"Know what's truly 'dumb'?" Palin Tweeted. "Giving a cover story to the Trig Truther conspiracy kook writer who thinks I didn't give birth to my son."
In a play on the "Birther" conspiracy surrounding Obama's birth certificate, Palin is calling out Sullivan for questioning whether she is Trig's real mother.
In 2008, Sullivan and others theorized that a Sarah Palin pregnancy scandal involving a cover-up of Bristol Palin getting knocked up could be in effect.
Bristol was, of course, pregnant with Tripp, not Trig.
He hypothesized that Palin "faked the pregnancy to avoid embarrassment for her daughter [Bristol Palin] or for political gain or some combination of reasons."
Sullivan's response to Palin calling him out today?"I have no idea, as I have said time and time again, whether Sarah Palin gave birth to Trig, and have never written such a thing."
"All I ever asked for a person who could become president was some basic evidence for her insane story, like medical records that most candidates have no problem providing."
"She never provided any, and preferred to withdraw from seeking public office rather than do so. Of course, no response to the substance. She doesn't do substance. Neither, it seems, does much of the rightwing blogosphere.
Other conservative bloggers have fired back against Sullivan on political grounds. Andrew Breitbart's Big Government writes "Why Is Andrew Sullivan So Dumb?"
"You'd have to be stupid, fanatical, and dishonest to argue - as Trig Truther Sullivan does - that Barack Obama's failures are part of an ingenious 'long game' destined to succeed," he wrote. "If this is the best Obama's supporters can do, Obama's only hope for re-election is the weak Republican field."
During a Fox News segment on Sullivan's article Monday night, the network blurred out Sullivan's name when showing the Newsweek cover.
"They are far too afraid to have me on to defend it," Sullivan wrote. "I've been on the blacklist for years. Like Ron Paul, too dangerous for Fox."