Bob Casey to endorse Obama, join bus tour  —  Pennsylvania Sen. Bob Casey plans to endorse Sen. Barack Obama for president today in Pittsburgh, sending a message both to the state's primary voters and to undecided superdelegates who might decide the close race for the Democratic presidential nomination.

Transcript: Mark McKinnon On Why He'll Leave The McCain Campaign If Obama Is The Democratic Nominee  —  National Journal's Linda Douglass sat down with Mark McKinnon for the March 28 edition of “National Journal On Air.”  This is a transcript of their conversation.  —  Q: I want to introduce Mark McKinnon.

Gallup Daily: Obama Back Into Lead in Democratic Race  —  McCain enjoys advantage in general election trial heat  —  PRINCETON, NJ — Today's Gallup Poll Daily tracking update finds Barack Obama with an eight percentage point advantage over Hillary Clinton (50% to 42%) …

Mahdi Army Stands Firm in its Basra Neighborhoods; Demonstrations in Baghdad against al-Maliki  —  Mahdi Army Stands Firm in its Basra Neighborhoods;  —  Demonstrations in Baghdad against al-Maliki  —  People are asking me the significance of the fighting going on in Basra and elsewhere.

Obama now says he might have left church  —  In appearance taped for airing this morning on “The View,” Senator Obama makes news by saying he might have left Chicago's Trinity United Church of Christ if the Rev. Jeremiah Wright had not retired.  —  In a clip posted by ABC, Obama says …

Loans and Leadership  —  When George W. Bush first ran for the White House, political reporters assured us that he came across as a reasonable, moderate guy.  —  Yet those of us who looked at his policy proposals — big tax cuts for the rich and Social Security privatization — had a very different impression.

Bush aide resigns  —  White House cites improper use of grant money  —  WASHINGTON - An aide to President Bush has resigned because of his alleged misuse of grant money from the U.S. Agency for International Development when he worked for a Cuban democracy organization.

FBI Focusing on ‘About Four’ Suspects in 2001 Anthrax Attacks  —  WASHINGTON — The FBI has narrowed its focus to “about four” suspects in the 6 1/2-year investigation of the deadly anthrax attacks of 2001, and at least three of those suspects are linked to the Army's bioweapons research facility …

GIULIANI WEIGHING ‘SPECIAL’ RUN FOR GOV  —  In the latest twist in New York politics, Rudy Giuliani is eyeing a run for governor in a special election this fall should Gov. Paterson be forced to resign, sources say.  —  A top adviser to the former mayor, who pulled the plug on his presidential bid …

Rice hits U.S. ‘birth defect’  —  Secretary of State Condoleezza Rice said yesterday that the United States still has trouble dealing with race because of a national “birth defect” that denied black Americans the opportunities given to whites at the country's very founding.

42 Democrats Vow a Drawdown in Iraq If They Win Seats  —  More than three dozen Democratic congressional candidates banded together yesterday to promise that, if elected, they will push for legislation calling for an immediate drawdown of troops in Iraq that would leave only a security force …

Limbaugh safe from voter-fraud charges  —  Radio host encouraged fans to vote Democratic  —  Radio talk-show host Rush Limbaugh has been telling his audience for days now that he could be indicted for encouraging Ohio Republicans to take a Democratic ballot in the March 4 primary in what he calls “Operation Chaos.”

NAA Reveals Biggest Ad Revenue Plunge in More Than 50 Years  —  NEW YORK The newspaper industry has experienced the worst drop in advertising revenue in more than 50 years.  —  According to new data released by the Newspaper Association of America, total print advertising revenue …