From Huffington Post:

With President Barack Obama set to deliver his first formal State of the Union address tonight, the political world turns its gaze to Rep. Joe Wilson (R-.S.C.), who unceremoniously shouted down Obama the last time he addressed a bicameral gathering of Congress.

The South Carolina Republican has pledged to act dignified during tonight’s address, telling the Associated Press that his “natural inclination is to be on my best behavior… I have the highest respect for the president, and I certainly look forward to the speech.”

Alas, Wilson may have already tossed presidential deference overboard. A Democratic source forwards over a radio interview Wilson did in late December in which he appears to fan the flames of birtherism, telling a caller that the issue of Obama’s country of origin should have been litigated during the Democratic primary process.

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