Fred Thompson Quits Presidential Race  —  NAPLES, Fla. (AP) - Former Tennessee Sen. Fred Thompson quit the Republican presidential race on Tuesday, after a string of poor finishes in early primary and caucus states.  —  “Today, I have withdrawn my candidacy for president of the United States.

The Death of Heath Ledger  —  The actor Heath Ledger was found dead Tuesday afternoon in an apartment in Manhattan, according to the New York City police.  Signs pointed to a suicide or an accidental overdose, police sources said.  Mr. Ledger was 28.  [Now online: Comprehensive coverage prepared for Wednesday editions of The Times.]

Obama most likely Democrat to unify America  —  THE DEMOCRATIC PRIMARY in South Carolina this year offers voters an unusual choice.  Earlier votes have winnowed out the most experienced candidates, leaving a field with fewer accomplishments and differences on policy, but including two candidates …

OBAMA vs. CLINTON....AGAIN....It's possible — likely, even — that everyone is tired of conversations about whether Barack Obama or Hillary Clinton would be more effective if they win the presidency.  That's doubly true since it's essentially unknowable at this point.

Will the Democratic presidential candidates adhere to their rhetoric?  —  (updated below - Update II)  —  Time's Massimo Calabresi predicts the likely outcome of the imminent FISA and telecom immunity fight, to begin this week or next: … Here we have a perfect expression …

Found in Translation  —  FBI whistleblower Sibel Edmonds spills her secrets.  —  Most Americans have never heard of Sibel Edmonds, and if the U.S. government has its way, they never will.  The former FBI translator turned whistleblower tells a chilling story of corruption at Washington's highest levels …

Barack Obama Talks to The Brody File  —  I just finished my sit-down interview with Sen. Barack Obama here in Greenville, S.C. We talked about everything from last night's debate, his troubles with Sen. Hillary Clinton and continuing Internet rumors that he's a Muslim.

Gov. Blunt won't seek second term  —  Missouri Gov. Matt Blunt, a Republican, just announced that he's not running for re-election this fall.  —  In a statement that shocked political leaders, in both parties, Blunt released a TV address “announcing that having achieved virtually everything …

Petraeus: I Need Another Six Months To Determine Whether 'We've Reached A Turning Point'  —  In the past few months, conservatives such as Sens. John McCain (R-AZ) and Joe Lieberman (I-CT) have been quick to declare victory in Iraq.  In November, McCain said that “we've succeeded militarily.”

Candidates Turn Attention to Gyrating Markets and Weakened Economy  —  CORAL BEACH, Fla. — The weakened economy and the turmoil in financial markets have helped to cement a gradual shift in emphasis in the presidential campaign to domestic issues from national security …