"I don't want a campaign that is divisive here, and there's a danger in that," Dodd said, although he denied he was nudging Sen. Hillary Rodham Clinton to end her candidacy.
Dodd said Obama was "ready to be president and I am ready to support him in this campaign."
The two men appeared together at a news conference. Dodd is the first of the Democratic campaign dropouts to endorse another candidate.
He said Obama "has been poked and prodded, analyzed and criticized, called too green, too trusting and for all of that has already won" more than half the states and millions of votes.
"It's now the hour to come together. ... This is the moment for Democrats and independents and others to come together, to get behind this candidacy," he said.
Dodd said he spoke with Clinton on Monday evening to tell her of his decision.
Dodd said he wasn't worried that the candidates would go too far in their pursuit of victory, but that their aides and supporters might.
"We've witnessed a little bit of that" in recent days, he said.
http://news.yahoo.com/s/ap/20080226/ap_on_el_pr/obama_dodd