At Debate, Two Rivals Go After Defiant Clinton  —  MANCHESTER, N.H. — It was as if they sensed vulnerability.  —  Senator Barack Obama and John Edwards went after Senator Hillary Rodham Clinton as never before in a televised debate here on Saturday night.

U.S. Considers New Covert Push Within Pakistan  —  WASHINGTON — President Bush's senior national security advisers are debating whether to expand the authority of the Central Intelligence Agency and the military to conduct far more aggressive covert operations in the tribal areas of Pakistan.

MY TAKE ON THE DEM DEBATE  —  So, a few observations about the Democratic debate.  —  First, a few months ago, I said that I didn't get what Barack Obama thought he was doing in one of the debates, that he was doing a very good job debating as the frontrunner, when in fact he was falling further and further behind Hillary Clinton.

Democratic Debate: Edwards Backs Up Obama  —  MANCHESTER, N.H. — Sen. Hillary Rodham Clinton (N.Y.) cast off the magnanimous, above-the-fray approach she had used up until now in the campaign, aggressively challenging Sen. Barack Obama (Ill.) and former Sen. John Edwards (N.C.) over which of the three can truly bring about change.

Bill Bradley to Back Barack Obama  —  ABC News' Karen Travers Reports: Former Sen. Bill Bradley will endorse Sen. Barack Obama in New Hampshire on Monday, ABC News has learned.  —  A source close to the senator said that he has waited until now to endorse because he wanted to give former Sen. John Edwards a shot in Iowa first.