Morning Buzz: Jan. 7, 2008

A new USA Today/Gallup poll shows Barack Obama opening up a double-digit lead over Hillary Clinton in the New Hampshire Democratic primary. Obama was the pick of 41 percent of voters surveyed while Clinton was named by 28 percent and John Edwards by 19 percent. In the GOP poll, John McCain led Mitt Romney by four points.

Five small vessels operated by the Iranian Revolutionary Guard acted in "a very aggressive way" against U.S. Navy ships this past weekend in the Strait of Hormuz near Iran, the Pentagon said today. Officials described the act as a "serious provocation" and said that Navy ships were forced to conduct evasive maneuvers to avoid open firing.

Yankees pitcher Roger Clemens filed a defamation suit Sunday against trainer Brian McNamee, claiming that McNamee made "untrue and defamatory" statements to investigators regarding Clemens's alleged use of performance-enhancing drugs. Clemens also appeared last night on 60 Minutes to refute the charges, which came to light last month in a report published by former Sen. George Mitchell, who has led Major League Baseball's comprehensive drug investigation.