Rep. Ron Paul waits to speak at a news conference in April in Des Moines, Iowa. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP

On April 1, Ali Tarhouni tells the media in Benghazi that Qatar agreed to give the rebels money for weapons and other items in exchange for the oil they control. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP

Jon Huntsman, the outgoing U.S. ambassador to China, briefs reporters in November 2009. If Huntsman joins the field of presidential candidates, he may have a difficult time explaining to Republican primary voters why he worked for a Democratic president. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP