Clinton Goes Nuclear; Obama Camp Fires Back  —  ABC News' David Wright, Sunlen Miller, Andy Fies, Eloise Harper, Kate Snow & Nitya Venkataraman Report: Closing in on the March 4 contests, Sen. Hillary Clinton, D-N.Y., debuted a campaign ad on Friday with ominous undertones.

State Democrats say Clinton camp may sue  —  Legal action could disrupt or delay caucuses, party says  —  AUSTIN — The Texas Democratic Party warned Thursday that election night caucuses scheduled for Tuesday could be delayed or disrupted after aides to Hillary Rodham Clinton threatened …

Hillary Ad: Who Do You Want Answering The White House Phone At 3 a.m.?  —  Hillary Clinton has a new ad in Texas, making what is perhaps her most forceful argument yet against Barack Obama on national security:  —  “It's 3 a.m., and your children are safe and asleep,” the announcer says.

Opponents slam Obama after CTV story on NAFTA  —  Allegations of double talk on NAFTA from the Obama and Clinton campaigns dominated the U.S. political landscape on Thursday.  —  On Wednesday, CTV reported that a senior member of Barack Obama's campaign called the Canadian embassy within …

DUMB SPIN.  —  Sometimes, I really wonder how dumb the Clinton campaign thinks we are. … So if Obama doesn't outright win the states Clinton is favored in — if he merely closes the gap — Democrats are “having second thoughts about him.”  —  Who is this aimed at?  Political reporters know it's dumb.

FOX News Poll: Clinton Leads in Ohio; Obama Up in Texas  —  Hillary Clinton has an 8-point lead over Barack Obama heading into Tuesday's Ohio Democratic primary, due largely to the support of white women, seniors and working-class voters, while the race is virtually a tie in Texas …

Israel prepares for assault on Gaza  —  As Hamas drew Ashkelon into the circle of communities coming under heavy rocket attacks, Defense Minister Ehud Barak and the Foreign Ministry on Thursday began preparing both Israeli and world opinion for the possibility of a large-scale incursion into Gaza.

CHUTZPAH.  —  I'm sort of busy today, but if some other enterprising blogger wants to collect pictures of George W. Bush meeting with leaders “who put [their] people in prison because of their political beliefs,” I'll certainly link to it.  The idea that Bush — who regularly hangs out with …

Hillary Cuts an Ad ... for McCain  —  Only the Clinton campaign would think mom would be checking on the kids at 3:00 am still dressed in her snazzy business suit.  —  I thought it was a bit creepy of that person to be looking in on your kids sleeping at 3am.

Copycat.  —  I feel bad about what I'm going to do here.  —  I've had a lot of fun at Tim Goeglein's expense over the last few months.  Mean-spirited fun, certainly, but my problem with him has always been one of personal taste.  In his columns for The News-Sentinel, my old newspaper …

Police: Deadly toxin found at Las Vegas hotel  —  (CNN) — Police in Las Vegas, Nevada, are investigating the discovery of what they said is the deadly poison ricin in a hotel room.  —  Authorities were called to an Extended Stay America hotel around 3 p.m. PT Thursday after a man brought …

Reformer: Trial Will Reveal ‘Cesspool’ of Obama's Allies  —  Trial for Indicted Fundraiser Tony Rezko Set for Monday  —  With the corruption trial of one of Sen. Barack Obama's longtime friends and supporters set to begin Monday in Chicago, Ill., reform watchdogs say it will reveal the …

Egyptian al Qaeda leader reported killed in South Waziristan airstrike  —  South Waziristan Taliban leader Mullah Nazir.  Click to view.  —  Pakistani and US intelligence are attempting to sort out the names of the al Qaeda and Taliban operatives killed in yesterday's airstrike in Azam Warzak, South Waziristan.

John McCain ‘Accidentally’ Calls Himself A “Liberal Republican”  —  At a town hall meeting in Richardson, Texas, Thursday afternoon, Sen. John McCain, R-Ariz., made a gaffe that will surely provide myriad conservative radio talk show hosts confirmation of their views, by accidentally calling himself a liberal.

Harry Withdrawn From Afghanistan  —  LONDON — The Defense Ministry announced Friday that Prince Harry, the third in line to the British throne, would have to come home from Afghanistan because it was too risky for him to stay there.  —  The prince, 23, has been in Helmand Province …