So the bloggers weren't even talking about current conditions in Baghdad. That left it to Rajiv Chandrasekaran, former Baghdad bureau chief of The Washington Post -- and author of the heralded 2006 book "Imperial Life in the Emerald City" -- who appeared on MSNBC's "Countdown" tonight to debunk this idea of a newly-safe Baghdad. "I talk to Iraqis all the time," he said.

He revealed that there had been steady insurgent artillery shots falling in the supposedly safe "Green Zone" all week, at least two Americans had died there in recent days, and U.S. Embassy staff had been instructed, in a switch, to wear their protective vests outside at all times. He also disclosed that the embassy's pool, scene of much partying in the recent past, has now been declared off-limits to extended stays.

To back up his point that pulling out of Iraq would be a disaster, President Bush had said today, "They have bloggers in Baghdad, just like we've got here," in a speech to the National Cattlemen's Beef Association.

Then he quoted two of them: "Displaced families are returning home, marketplaces are seeing more activity, stores that were long shuttered are now reopening. We feel safer about moving in the city now. Our people want to see this effort succeed."

Only hours later did the White House reveal that the bloggers were brothers, Mohammed and Omar Fadhil, and these supposedly little-known average Joes had met Bush in the Oval Office in 2004. They are dentists and write an English-language blog from Baghdad called IraqTheModel.com, also available via Pajamas Media.

Nor did Edwards hope to spread his message by putting himself at the mercy of others. Like all candidates now, Edwards has his own Web site and his own videographer. As he did some volunteer work in the 9th Ward on Wednesday afternoon, he taped a message that his campaign posted later that night on his campaign Web site and on YouTube.com. What he said in that video was nearly identical to what he said to a bank of network and local television station cameras on Thursday.

Smart candidates know the old command-and-control structures of politics don't work anymore. Instead, campaigns are all about building communities and speaking directly to supporters, whether through email or podcasts or what the Edwards team calls "webisodes." As part of his announcement day, he spent a few minutes answering questions on the Daily Kos site, an influential liberal blog.

Candidates are looking for ways to get people more directly involved, by challenging them to give money not just to their campaign but to worthy causes; or by asking them to volunteer their time in New Orleans (as Edwards has done) or in their own communities, or by challenging them to take direct action politically to stop a war or a dam or to enact a piece of legislation.

The 24/7 culture demands dynamic messaging and niche marketing. Edwards offered a window into that future with his announcement day activities. By throwing out the old rules, he hopes his second bid for the White House will be more successful than the first.

Former Democratic vice presidential nominee John Edwards jumped into the presidential race Wednesday a day earlier than he'd planned, prodded by an Internet glitch to launch a candidacy focused on health care, taxes and other domestic issues.

The North Carolina Democrat's campaign accidentally went live with his election Web site a day before an announcement Thursday that was supposed to use Hurricane-ravaged New Orleans as a backdrop.

GRETA: Why do you think it's gotten so adversarial? Tonight is literacy. Everybody comes in from all different sides and wants to help. It seems like oftentimes in Washington, you know, on something we all want to work towards it's not necessarily so civilized. It's not so pleasant.

H.W. BUSH: It's true but that's not new really. I mean, you go back in history and you'll find that there was always adversarial politics. There was always gut fighting. And it's probably a little worse now given the electronic media and the bloggers and all these kinds of things. But I don't despair about it. I think things - there is a pendulum at work at times so you swing away from the incivility back to more normal climate.