White House Press Secretary Robert Gibbs once again dismissed conspiracy theories about the president's citizenship ... ... in his daily briefing Monday, noting that proof of President Obama's birthplace had been posted online and Obama's citizenship had been demonstrated "ad nauseam." But Gibbs, sounding alternately bemused and exasperated, told White House reporters that conspiracy theories about the president's birthplace would never go away. "I hate to indulge, in such an august setting as the White House briefing room...the made-up, fictional nonsense whether the president was born in this country," Gibbs said. "If I had some DNA, it wouldn't assuage those...